Word.ws English Dictionary

Words That Start with BI

There are 661 words that start with BI on Word.ws, from 2 to 15 letters. The most common length is 7 letters (82 words). The words used most often are big, bit, bill, biggest and birth.

Meanings from Wiktionary. Not an official Scrabble, Words With Friends or Wordle word list.

2-letter words that start with BI

  • bi4n. A biceps muscle.

3-letter words that start with BI

  • bib7n. An item of clothing for people (especially babies) tied around their...
  • bid6v. To issue a command; to tell.
  • bif8n. A public washroom.
  • big6adj. Of great size, large.
  • bih8n. A bitch.
  • bim7n. A woman.
  • bin5n. A box, frame, crib, or enclosed place, used as a storage container.
  • bio5n. A short section of a user profile that contains information about the...
  • bip7v. To make or cause to make a short beeping or blipping sound.
  • bis5adv. Twice; showing that something is, or is to be, repeated, such as a...
  • bit5n. A small amount of something.
  • bix12n. Biscuits.
  • biz14n. Business, especially showbusiness.

4-letter words that start with BI

  • bias6n. Inclination towards something.
  • bibb10n. Synonym of bibcock.
  • bibi8n. A grandmother.
  • bibs8n. Another name for overalls.
  • bice8n. A pale blue pigment, prepared from the native blue carbonate of copper...
  • bide7v. To bear; to endure; to tolerate.
  • bier6n. A litter to transport the corpse of a dead person.
  • biff12n. A sudden, sharp blow or punch.
  • biga7n. A Roman racing chariot drawn by two horses abreast.
  • bigg8v. To build.
  • bija13n. The origin or cause of things.
  • biju13n. The honey badger.
  • bike10n. Any vehicle sharing some characteristics with a bicycle or motorbike...
  • biko10n. A sweet rice cake from the Philippines, made with coconut milk and...
  • bile6n. A bitter brownish-yellow or greenish-yellow secretion produced by the...
  • bilk10n. The spoiling of someone's score in the crib.
  • bill6n. A written list or inventory. (Now obsolete except in specific senses or...
  • bilo6n. Half a coconut shell, used in Fiji as a cup for drinking alcohol.
  • bima8n. The raised platform in the front of a synagogue where the Torah is read...
  • bind7v. To tie; to confine by any ligature.
  • bine6n. A twining vine which climbs by its shoots growing in a helix around a...
  • bing7n. Solitary confinement.
  • bink10n. A bench.
  • bino6n. The superpartner of the gauge boson corresponding to weak hypercharge....
  • bins6n. Binoculars.
  • biog7n. A biography.
  • bion6n. A cyborg or robot.
  • bios6n. A particular mode of life, a qualified life.
  • biot6n. Synonym of abampere.
  • bipa8n. A pear-shaped lute with five strings, of Korean origin.
  • bird7n. An animal of the clade (traditionally class) Aves in the phylum...
  • birk10n. A birch tree.
  • biro6n. A Biro brand ballpoint pen.
  • birr6n. Strength, vigor, energy.
  • birt6n. A fish of the turbot kind; the brill.
  • bise6n. A cold and dry north wind; in particular in France, Switzerland, etc.
  • bish9n. A minced oath (as a term of abuse).
  • bist6v. Used to form the second person singular of be.
  • bite6v. To cut into something by clamping the teeth.
  • bits6n. Genitals.
  • bitt6n. The bitts.
  • bivy12n. A bivouac sack.
  • biwa9n. A plucked lute, originating in the classical and traditional music of...

5-letter words that start with BI

  • bibbs11n. Pieces of timber bolted to certain parts of a mast to support the...
  • bible9n. A comprehensive manual that describes something, or a publication with...
  • bicep11n. A biceps.
  • bidar8n. The ability to detect whether or not a person is bisexual by observing...
  • biddy12n. An attractive girl.
  • bidet8n. A low-mounted plumbing fixture or type of sink intended for washing the...
  • biffy16n. A toilet.
  • bifid11adj. Cleft; divided into two principal or main parts, such as two lobes.
  • biggy12n. Something large in size in comparison to similar things.
  • bight11n. A corner, bend, or angle; a hollow.
  • bigly11adj. Habitable, liveable; hence delightful, pleasant, pleasing.
  • bigot8n. One who is narrow-mindedly devoted to their own ideas and groups, and...
  • bijou14n. A jewel.
  • biker11n. A person whose lifestyle is centered on motorcycles, sometimes a member...
  • bikie11n. A motorcyclist who is a member of a club; a biker.
  • bilbo9n. A device for punishment. See bilboes.
  • bilby12n. An Australian desert marsupial of the only extant species Macrotis...
  • bilge8n. The rounded portion of a ship's hull, forming a transition between the...
  • bilic9adj. Of or relating to bile.
  • billy10n. A fellow, companion, comrade, mate; partner, brother.
  • bindi8n. The “holy dot” traditionally worn on the forehead of Hindu women.
  • binge8n. A short period of excessive consumption, especially of food, alcohol...
  • bingo8n. A game of chance for two or more players, who mark off numbers on a...
  • binky14n. A stuffed animal, pillow, blanket, or toy that a small child is more...
  • binny10n. Niger barb (Labeobarbus bynni or Barbus bynni), a species of yellowfish...
  • biome9n. Any major regional biological community such as that of forest or...
  • biota7n. Synonym of life; Biota; all living things.
  • biped10n. An animal, being, or construction that goes about on two feet (or two...
  • bipod10n. A two-legged stand or organism.
  • birch12n. Any of various trees of the genus Betula, native to countries in the...
  • birdy11adj. Resembling or characteristic of a bird.
  • birth10n. The process of childbearing; the beginning of life; the emergence of a...
  • bison7n. A large, wild bovid of the genus Bison.
  • biter7n. A fish that tends to take bait.
  • bitey10adj. Inclined to bite.
  • bitsy10adj. Fragmented.
  • bitto7n. A cheese produced in the Valtelline valley in Lombardy.
  • bitty10adj. Containing bits; fragmented.
  • bizen16n. Something serving as a warning or an example to be avoided.
  • bizet16n. The upper faceted portion of a brilliant-cut diamond, which projects...

All 58 5-letter words that start with BI

6-letter words that start with BI

  • biased9adj. Exhibiting bias; prejudiced.
  • bibble12v. To eat and/or drink noisily.
  • bicarb12n. Bicarbonate (HCO₃⁻).
  • biceps12n. Any muscle having two heads.
  • bichir13n. Any ray-finned fish of the genus Polypterus in the family Polypteridae...
  • bichon13n. Any of a class of toy dogs with curly or wavy hair and long curled...
  • bicker14v. To quarrel in a tiresome, insulting manner.
  • bidder10n. Someone who bids (all senses), but most commonly, one offers to pay a...
  • biding10n. An awaiting; expectation.
  • bifida12n. Spina bifida.
  • bifold12adj. Twofold, double.
  • bigamy14n. The state of having two (legal or illegal) spouses simultaneously.
  • bigeye12n. Any fish in the taxonomic family Priacanthidae, which have large eyes.
  • biggin10n. An official's hood or coif.
  • bigwig13n. A person of importance in a group or organization.
  • biking13n. The act, process, or sport of riding a bicycle.
  • bikini12n. A brief, often minimalistic two-piece bathing suit worn by women...
  • billed9adj. Having a specified kind of bill (beak or beak-like projection).
  • biller8n. An issuer of a bill.
  • billet8n. A short informal letter.
  • billon8n. Any of several alloys of precious metals and base metals that are used...
  • billow11n. A large wave, swell, surge, or undulating mass of something, such as...
  • bimini10n. A lightweight cover, usually made of fabric stretched on a metal frame...
  • binary11adj. Being in one of two mutually exclusive states.
  • binder9n. Someone who binds.
  • binger9n. Someone who binges.
  • bingle9n. A minor collision, especially between motor vehicles.
  • binned9adj. Drunk.
  • biogas9n. A mixture of methane and carbon dioxide, produced by anaerobic...
  • biogen9n. Bioplasm.
  • bionic10adj. Related to bionics.
  • biopic12n. A motion picture based on the life (or lives) of a real, rather than...
  • biopsy13n. The removal and examination of a sample of tissue, cells, or bodily...
  • biotic10adj. Of, pertaining to, or produced by life or living organisms.
  • biotin8n. A sulfur-containing member of the vitamin B complex...
  • birder9n. A birdwatcher.
  • birdie9n. A bird; especially, a small and cute one.
  • bisect10v. To cut or divide into two parts.
  • bishop13n. An overseer of congregations: either any such overseer, generally...
  • bisque17n. A thick creamy soup made from fish, shellfish, meat or vegetables.
  • bissel8n. A small amount; a bit.
  • bisson8adj. Sandblind, purblind.
  • bistro8n. A small casual restaurant or pub, typically serving French-style...
  • biting9n. An instance of something being bitten.
  • bitmap12n. A series of bits that represents a rasterized graphic image, each pixel...
  • bitten8adj. That has received a bite.
  • bitter8adj. Having an acrid taste (usually from a basic substance).
  • bitzer17n. A mongrel dog.

The 48 most common of 67 are shown.

7-letter words that start with BI

  • biasing10n. The process of adding a bias.
  • bicycle16n. A vehicle that has two primary wheels, one behind the other, a steering...
  • bidding12n. That which one is bidden to do; a command.
  • bigfoot13v. To control or manage forcefully; to exercise authority over.
  • biggers11n. Those bigger than oneself.
  • biggest11n. Something that is bigger than all others in its class.
  • bighead14n. A person with an inflated opinion of themselves; a conceited or...
  • bighorn13n. Certain North American species of sheep.
  • bigness10n. The characteristic of being big.
  • bigoted11adj. Having the characteristics of a bigot; strongly prejudiced; forming...
  • bigotry13n. The condition or the characteristic quality of a bigot, especially...
  • bigtime12adj. Of major significance or importance.
  • bikeway19n. A bicycle lane or path.
  • bilayer12n. Any structure consisting of two layers of molecules.
  • biliary12adj. Of or pertaining to bile or the bile duct.
  • bilious9adj. Of or pertaining to something containing or consisting of bile.
  • billing10n. Amounts billed.
  • bimodal12adj. Having two modes or forms.
  • bindery13n. A workshop or factory where books are bound.
  • binding11adj. Imposing stipulations or requirements that must be honoured.
  • binning10n. A data pre-processing technique in which original data values fall into...
  • biochar14n. Charcoal that is used as a soil conditioner.
  • biochem16n. Biochemistry (science or industry).
  • biofilm14n. A structured community of microorganisms, such as bacteria, that adhere...
  • biofuel12n. Any fuel that is obtained from a renewable biological resource...
  • biology13n. The study of all life or living matter.
  • biomass11n. The total mass of a living thing or a part thereof (such as a cell).
  • bionics11n. The design of engineering systems, especially electronic ones, based on...
  • biotech14n. Biotechnology.
  • biotite9n. A dark brown mica; it is a mixed aluminosilicate and fluoride of...
  • bipedal12adj. Walking on two feet or two legs; biped.
  • biplane11adj. Composed of, or relating to, two planes (flat surfaces extending...
  • bipolar11adj. Involving or having both extremes or poles at the same time.
  • birding11n. Birdwatching.
  • birdman12n. A man who works with birds.
  • birther12n. One who gives birth.
  • biryani12n. A spiced dish of rice, blended with meat and/or vegetables.
  • biscuit11n. A small, flat, baked good which is either hard and crisp or else soft...
  • bismuth14n. A chemical element (symbol Bi) with an atomic number of 83: a brittle...
  • bitcoin11n. A unit of the bitcoin (proper noun proper noun sense 1) cryptocurrency.
  • bitrate9n. The frequency at which bits (binary digits) pass a given physical or...
  • bittern9n. Several bird species in the Botaurinae subfamily of the heron family...
  • bitters9n. A liquid used in mixed drinks or as a tonic into which bitter herbs...
  • bitumen11n. A sticky, black, highly viscous liquid or semi-solid form of petroleum...
  • bivalve15n. Any mollusc belonging to the taxonomic class Bivalvia, characterized by...
  • bivouac14n. An encampment for the night, usually without tents or covering.
  • bizarre18adj. Strangely unconventional; highly unusual and different from common...
  • bizarro18adj. Being the opposite or logical inverse of a familiar person, place, or...

The 48 most common of 82 are shown.

8-letter words that start with BI

  • biannual10adj. Occurring twice a year; semiannual.
  • biathlon13n. Racing combining cross-country skiing and rifle shooting.
  • bibimbap18n. A Korean dish of white rice topped with vegetables, beef, a whole egg...
  • biblical14adj. Of or relating to the Bible.
  • bicuspid15adj. Having two points or prominences; ending in two points; said of teeth...
  • biennale10n. A biennial celebration or exhibition.
  • biennial10adj. Happening every two years.
  • biennium12n. A period of two years, particularly for purposes involving...
  • bifocals15n. Spectacles that have corrective lenses of two different powers; used by...
  • bigamist13n. One who practices bigamy.
  • bigmouth16adj. Applied to various creatures that have a large mouth.
  • bilberry15n. Vaccinium myrtillus, the wild European blueberry of the cowberry family.
  • bilinear10adj. Linear (preserving linear combinations) in each variable.
  • billable12adj. Capable of being billed for.
  • billeted11adj. Having a billet.
  • billfish16n. Any of several fish, of the families Istiophoridae and Xiphiidae, that...
  • billfold14n. A small, folding sleeve or case designed to hold paper currency, as...
  • billiard11n. A shot in billiards or snooker in which the cue ball strikes two other...
  • binaural10adj. Of, relating to, affecting, or designed for use with two ears.
  • bindweed15n. True bindweed (Convolvulus).
  • bingeing12n. A session in which something is binged, such as food or television.
  • binnacle12n. The wooden housing for a ship's compass, with its corrector magnets and...
  • binomial12adj. Consisting of two terms, or parts.
  • bioassay13n. The analysis of the biological activity of a substance, with reference...
  • biogenic13adj. Produced by living organisms, or by a biological process.
  • biograph16n. An early device to show moving pictures on a screen.
  • biologic13adj. Biological; pertaining to biology or to a living organism.
  • biphasic17adj. Having two phases.
  • biphobia17n. Antipathy towards bisexuals.
  • biracial12adj. Of or pertaining to two races.
  • birdbath16n. A shallow basin, sometimes ornamental, filled with water for wild birds...
  • birdcage14n. A cage to keep pet or zoological specimen birds in.
  • birdlife14n. Birds collectively; avifauna.
  • birdlike15adj. Similar to a bird or an aspect of a bird; reminiscent of birds.
  • birdseed12n. Seed, usually constituting a mixture from several species of plant, set...
  • birdshot14n. Small lead or steel shot, as pieces of ammunition, used in shotgun...
  • birdsong12n. Vocalisations made by birds, considered collectively.
  • birthday17n. The anniversary of the day on which someone is born.
  • birthing14n. The act of giving birth.
  • biscotti12n. A hard, usually nut-flavored biscuit, derived from the Tuscan cantuccio.
  • bisected13adj. Divided into two equal pieces.
  • bisexual17adj. Sexually attracted to both opposite-sex and same-sex individuals....
  • bismarck18n. A doughnut filled with cream, often with chocolate icing.
  • bistable12adj. Having two stable states.
  • bitingly14adv. In a biting manner.
  • bitterly13adv. In a bitter manner.
  • bivalent13adj. Having a valence of 2; having two ligands.
  • biweekly20adj. Occurring once every two weeks; fortnightly.

The 48 most common of 81 are shown.

9-letter words that start with BI

  • biathlete14n. An athlete who competes in the biathlon.
  • bicameral15adj. Being or having a system with two, often unequal, chambers or...
  • bickering18adj. That bickers; argumentative.
  • bicycling19n. The act of riding a bicycle.
  • bidentate12adj. Having only two teeth.
  • bifurcate16v. To divide or fork into two channels or branches.
  • bijection20n. A one-to-one correspondence, a function which is both a surjection and...
  • bikeshare18n. A service by which bicycles are made available for shared use to...
  • bilateral11adj. Having two sides.
  • bilingual12adj. Having the ability to speak two languages fluently.
  • bilirubin13n. A bile pigment that is a product of the breakdown of the heme portion...
  • billabong14n. An anabranch, backwater or oxbow lake that is temporarily cut off from...
  • billboard14n. A very large outdoor sign, generally used for advertising.
  • billeting12n. The lodging of soldiers.
  • billiards12n. A two-player cue sport played with two cue balls and one red ball, on a...
  • billionth14adj. The ordinal form of the number one billion.
  • billowing15n. The act of something that billows; a billow.
  • bimonthly19adj. Occurring once every two months.
  • binocular13adj. Using two eyes or viewpoints; especially, using two eyes or viewpoints...
  • bioactive16adj. Biologically active; having a biological effect.
  • biodiesel12n. Fuel for diesel engines made from renewable organic raw materials, as...
  • bioenergy15n. Energy produced from a biological resource such as biomass as biofuel.
  • bioethics16n. The branch of ethics that studies the implications of biological and...
  • biography20n. A person's life story, especially one published.
  • biohazard24n. A biological hazard: a source of risk due to some biological factor...
  • biologist12n. A student or professor of biology; one versed in the science of biology.
  • biomarker17n. A substance used as an indicator of a biological state, most commonly...
  • biometric15adj. Of, relating to, or using biometrics.
  • bionomics15n. The study of an organism and its relation to its environment; ecology.
  • biopharma18n. The biopharmaceutical industry.
  • biophilia16n. The biological drive to preserve oneself; love of life.
  • biosafety17n. Protection from potential harm from biological agents, such as...
  • biosensor11n. Any device that detects, records or transmits physiological data...
  • biosphere16n. The part of the Earth and its atmosphere capable of supporting life.
  • bioweapon16n. Any weapon designed to be used in biological warfare.
  • bipartite13adj. Having two parts (two principal or main parts).
  • birchwood20n. A wood largely populated with birch trees (Betula spp.).
  • birdhouse15n. A small house or nest box for birds.
  • birthdate15n. The year, month, and day of someone's birth; a date of birth.
  • birthmark20n. A mark on the skin formed before birth.
  • birthrate14n. The ratio of total live births to total population for a specific...
  • bisection13n. An act of division into two parts, especially two equal parts.
  • bishopric18n. A diocese: a region in which a bishop of a church governs.
  • bisphenol16n. Any of a class of organic compounds, derived from methylenediphenol...
  • bisulfite14n. The univalent group -HSO₃, or any salt containing it.
  • bitstream13n. A stream of bits (binary digits).
  • bivariate14adj. Having or involving exactly two variables.
  • bizarrely23adv. In a bizarre manner.

The 48 most common of 75 are shown.

10-letter words that start with BI

  • biannually15adv. Taking place twice per year, semiannually.
  • biblically19adv. In a biblical manner.
  • bicultural14adj. Adapted to two separate cultures.
  • biennially15adv. Taking place every two years.
  • biergarten13n. Beer garden.
  • bifurcated18adj. Divided into two branches.
  • bimetallic16adj. Pertaining to the use of gold and silver to create legal currency.
  • binational12adj. Relating to, or involving, two nations.
  • binoculars14n. A hand-held device consisting of a series of lenses and prisms, used to...
  • biochemist19n. A chemist whose speciality is biochemistry.
  • biocontrol14n. The biological control of pests by the use of organisms that are...
  • biodefense16n. Any defensive measure taken against an attack using bacteria, viruses...
  • biodegrade15v. To decompose as a result of biological action, especially by...
  • biodiverse16adj. Biotically diverse; having a high degree of biodiversity.
  • biodynamic20adj. Of, or relating to the effects of motion, or other change, on (or in)...
  • bioethanol15n. Ethanol produced, by fermentation of crops, for use as a biofuel.
  • bioethical17adj. Of or pertaining to bioethics.
  • biofouling16n. The accumulation of living organisms (bacteria, fungi, protozoa, algae...
  • biogenesis13n. The principle that living organisms are produced only from other living...
  • biogenetic15adj. Of or pertaining to biogenesis.
  • biographer18n. The writer of a biography; a professional writer of biographies.
  • biographic20adj. Biographical.
  • biohacking22n. A set of practices that aims to alter, optimize, or extend biological...
  • biological15adj. Of or relating to biology.
  • biomedical17adj. Of or pertaining to biomedicine.
  • biomethane17n. A biogas composed mostly of methane.
  • biometrics16n. The automated measurement of biological data.
  • biomimetic18adj. Of, related to, or produced by biomimetics.
  • biomimicry21n. The imitation of biological designs or processes in engineering...
  • biomorphic21adj. Having the appearance of a biomorph; representing a living organism...
  • biophysics22n. The interdisciplinary science that applies theories and methods of the...
  • bioplastic16adj. Of or relating to bioplasts and bioplasm.
  • biopolymer19n. Any macromolecule of a living organism that is formed from the...
  • bioprocess16n. Any technological process that uses living cells or their components.
  • bioreactor14n. A vat or pressure vessel, containing microorganisms or biochemically...
  • bioscience16n. Any of several sciences that deal with living organisms.
  • biosensing13n. The use of nanoscale or microscale biological sensors.
  • biosimilar14n. A variant of a biopharmaceutical that is marketed following the expiry...
  • bipartisan14adj. Relating to, or supported by two groups, especially by two political...
  • bipedalism17n. The habit of standing and walking on two feet; the state of being...
  • bipolarity17n. The state of being bipolar.
  • birthplace19n. The location where a person or an animal was born.
  • birthright19n. Something a person is entitled to due to the circumstances of their...
  • birthstone15n. Any of twelve gemstones traditionally associated with the month of...
  • bitartrate12n. Hydrogen tartrate (univalent salt of tartaric acid).
  • bitterness12n. The quality of having a bitter taste.
  • bitterroot12n. Lewisia rediviva, a small, low, pink flower with a yellow center.
  • bituminous14adj. Of or pertaining to bitumen.

The 48 most common of 72 are shown.

11-letter words that start with BI

  • bibliomania17n. A passion for owning valuable books.
  • bibliophile20n. One who loves books.
  • bibliotheca20n. A library.
  • bicarbonate17n. The univalent anion HCO₃⁻; any salt of carbonic acid in which only one...
  • bicentenary18n. Synonym of bicentennial (“a 200th anniversary”).
  • bifurcating19adj. Dividing or forking into two.
  • bifurcation18n. A division into two branches.
  • bikepacking26n. Recreational multiday travel on a bicycle, often off-road and with...
  • bilaterally16adv. In a bilateral manner.
  • bilingually17adv. In a bilingual manner; using two languages.
  • billionaire13n. Somebody whose wealth is at least one billion (10⁹) currency units...
  • bimatoprost17n. A prostaglandin analog C₂₅H₃₇NO₄ used topically to reduce elevated...
  • bimetallism17n. The use of a monetary standard based upon two different metals...
  • bimolecular17adj. Involving two molecules.
  • bioactivity21n. Biologic activity, such as biochemical or immunologic reactivity: the...
  • bioanalysis16n. Biochemical analysis.
  • biocentrism17n. An ethical viewpoint that extends inherent value to all non-human life...
  • biochemical22adj. Of, or relating to biochemistry.
  • bioclimatic19adj. Of or pertaining to the relationship between living things and climate.
  • biocultural15adj. Relating to a bioculture.
  • biodynamics21n. Biodynamic agricultural practices similar to organic farming.
  • bioelectric17adj. Of or pertaining to bioelectricity.
  • bioengineer14n. A biologist or engineer whose speciality is bioengineering.
  • bioethicist18n. An expert in bioethics.
  • biofeedback25n. A technique of gaining greater awareness of the many physiological...
  • bioleaching19n. The dissolution of metals from their ores by the use of microorganisms...
  • biologicals16n. Biological products, such as antitoxins or vaccines, used to induce...
  • biomaterial15n. A nonviable, biocompatible material used in a medical device, intended...
  • biomedicine18n. The application of biology and physiology to clinical medicine.
  • biomimetics19n. The study of the structure and function of living things as models for...
  • biomolecule17n. Molecules, such as amino acids, sugars, nucleic acids, proteins...
  • biophysical23adj. Of or pertaining to a combination of biology and physics.
  • biopolitics17n. The interdisciplinary studies relating biology and political science.
  • bioprinting16n. The construction of a biological structure by computer-aided...
  • biorefinery19n. A facility that carries out coproduction of a range of...
  • bioregional14adj. Of or pertaining to a bioregion.
  • bioresource15n. Any resource of biological origin.
  • biosecurity18n. The protection of plants and animals against harm from disease or from...
  • biosorption15n. Synonym of bioabsorption.
  • bipyramidal21adj. Having the shape of a bipyramid.
  • birdwatcher22n. A person who observes or identifies wild birds in their natural...
  • birthmother21n. The biological mother of an adopted child.
  • birthweight23n. The amount that a baby weighs at the time of birth.
  • bisexuality23n. The state of being sexually attracted to members of either sex...
  • bistability18n. The state or condition of being bistable.
  • bittersweet16adj. Both bitter and sweet.
  • bivalirudin17n. A specific and reversible direct thrombin inhibitor, a synthetic...
  • bizarreness22n. The state or quality of being bizarre.

The 48 most common of 56 are shown.

12-letter words that start with BI

  • bibliography25n. A section of a written work containing citations, not quotations, to...
  • bibliometric20adj. Of or pertaining to bibliometrics.
  • bibliotheque28n. A collection of books or treatises.
  • bicalutamide19n. An oral nonsteroidal antiandrogen used in the treatment of prostate...
  • bicameralism20n. The practice of dividing legislative bodies into two chambers with...
  • bicentennial16adj. Relating to the 200th anniversary of an event or happening.
  • bifunctional19adj. Having two functions.
  • bilingualism17n. The condition of being bilingual; the ability to speak two languages.
  • billingsgate16n. Profane, abusive language; coarse words.
  • bioacoustics18n. A cross-disciplinary science that combines biology and acoustics...
  • bioavailable19adj. Able to be absorbed by a living organism.
  • biocatalysis19n. Catalysis using biological catalysts (especially enzymes, whether...
  • biocatalytic21adj. Relating to, or employing biocatalysis.
  • biochemistry24n. The chemistry of those compounds that occur in living organisms, and...
  • biodiversity21n. The diversity (number and variety of species) of plant and animal life...
  • bioenergetic17adj. Of or pertaining to bioenergetics.
  • biogeography24n. The study of the geographical distribution of living things.
  • biographical22adj. Of or relating to an account of a person's life.
  • biohazardous27adj. Constituting a biohazard.
  • bioidentical17adj. Identical to that which is naturally produced by the body.
  • bioimpedance21n. The response of a living organism to an applied electric current.
  • bioinorganic17adj. Describing the influence of inorganic compounds (especially metals) on...
  • biologically20adv. In a biological manner.
  • biomechanics23n. The branch of biophysics that deals with the mechanics of the human or...
  • biomolecular18adj. Relating to biomolecules (especially macromolecules).
  • biopesticide19n. Any naturally-occurring (rather than synthetic) pesticide.
  • biophotonics21n. The study of the interaction of individual photons with biological...
  • biophysicist24n. A biologist or physicist whose speciality is biophysics.
  • biopolitical18adj. Of or pertaining to biopolitics.
  • bioretention14n. Retention (removal) of groundwater contaminants.
  • biosignature15n. Any measurable phenomenon that indicates the presence or probable...
  • biosynthesis20n. The synthesis of organic compounds within a living organism, especially...
  • biosynthetic22adj. Of or pertaining to biosynthesis.
  • biotechnical21adj. Of or pertaining to biotechnology.
  • bioterrorism16n. Terrorism that involves biological weapons or other biological agents.
  • bioterrorist14n. One who engages in bioterrorism; a terrorist employing biological...
  • biotinylated18adj. Modified by reaction with a biotin group.
  • bioturbation16n. The mixing of soil or sediment by living organisms.
  • birdwatching24n. Observing or identifying wild birds in their natural environment.
  • birefringent18adj. Of or pertaining to birefringence.
  • bisphosphate24n. A diphosphate, especially a compound with two phosphate groups attached...

13-letter words that start with BI

  • bibliographer23n. A person who compiles bibliographies, or who studies bibliography.
  • bibliographic25adj. Of or pertaining to bibliography.
  • bibliometrics21n. The statistical analysis of texts, especially of published literature...
  • bibliotherapy25n. A nonpharmacological therapy using reading materials to meet people’s...
  • biconditional18adj. Having two conditions.
  • biculturalism19n. The state or quality of being bicultural.
  • bidirectional18adj. Moving in two directions (usually opposite).
  • bildungsroman19n. A novel tracing the spiritual, moral, psychological, or social...
  • bioaccumulate21v. To accumulate in a biological system over time.
  • bioanalytical20adj. Of or pertaining to analytical methods used in biotechnology.
  • bioartificial20adj. Describing any artificial device that has biological components.
  • biobehavioral23adj. Pertaining to the biological causes of behavior.
  • biochemically27adv. With reference to biochemistry.
  • biocompatible23adj. Compatible with biological tissue.
  • bioconversion20n. The conversion of biological material into usable products; but...
  • biodegradable20adj. Capable of being decomposed by biological activity, especially by...
  • bioelectrical19adj. Pertaining to bioelectricity.
  • bioelectronic19adj. Of or pertaining to bioelectronics.
  • bioenergetics18n. The study of the energy transformations that take place in living...
  • bioengineered17adj. Produced, or modified, by bioengineering.
  • biofiltration18n. A technique for pollution control using living material to capture and...
  • biogeographic24adj. Of or pertaining to biogeography.
  • bioinformatic22adj. Of or pertaining to bioinformatics.
  • biomechanical24adj. Of or pertaining to biomechanics.
  • biometrically22adv. In a biometric way; through use of biometrics.
  • biomicroscopy26n. The microscopic examination of biological tissue.
  • biomonitoring18n. The monitoring of the organisms that live in a particular environment...
  • bioprocessing20n. The processing of something using a biological agent.
  • bioprosthetic22adj. Relating to a bioprosthesis.
  • biopsychology29n. Biological psychology.
  • bioresorbable19adj. That can be broken down and absorbed by the body, and thus does not...
  • biostatistics17n. The application of statistics to the study and analysis of biological...
  • biotechnology24n. The use of living organisms (especially microorganisms) in industrial...
  • biotinylation18n. The attachment of a biotin residue to a biological macromolecule in...
  • birefringence21n. The splitting of a ray of light into two parallel rays of perpendicular...
  • biventricular20adj. Relating to two ventricles.

14-letter words that start with BI

  • bioarchaeology25n. Zooarchaeology.
  • biocontainment20n. Any of several techniques used to ensure that biohazards are contained...
  • biodegradation19n. The decomposition of any material by microorganisms.
  • bioelectricity23n. Any form of electricity generated within an organism, especially by a...
  • bioelectronics20n. The application of electronics in the field of biology.
  • bioengineering18n. The applications of the principles of engineering to any of the...
  • bioequivalence30n. A measure of the equivalence of multiple formulations of a drug in...
  • biofabrication23n. The manufacture of things from biological materials.
  • biogeochemical26adj. Of or pertaining to biogeochemistry.
  • biographically27adv. In the form of a biography.
  • bioinformatics23n. A field of science in which biology, computer science, and information...
  • bioluminescent20adj. Exhibiting bioluminescence.
  • biomathematics25n. The application of mathematics to the study of biological systems and...
  • bioprospecting23n. The methodical search for novel pharmaceutical (and other) products...
  • bioremediation19n. The use of biological organisms, usually microorganisms, to remove...
  • biostatistical18adj. Pertaining to biostatistics.
  • bipartisanship23n. In the context of a two-party system, especially in the United States...
  • bisphosphonate26n. Any of a class of organic compounds having two phosphate groups...

15-letter words that start with BI

  • bibliographical27adj. Bibliographic.
  • bidirectionally23adv. In opposite directions.
  • bifidobacterium27n. Any bacterium of the genus Bifidobacterium.
  • bioaccumulation23n. The process by which substances accumulate in the tissues of living...
  • bioaccumulative26adj. That tends to accumulate in an organism when the organism's ability to...
  • bioavailability25n. The extent to which a substance is molecularly available to cells and...
  • biodistribution20n. The distribution (static and dynamic) of compounds within a biological...
  • biogeochemistry28n. The scientific study of biological, geological and chemical processes...
  • biogeographical26adj. Of or pertaining to biogeography.
  • bioluminescence23n. The emission of light by a living organism (such as a firefly).
  • biomechanically29adv. With regard to biomechanics.
  • biopsychosocial29adj. Having biological, psychological and social characteristics.
  • biostatistician19n. Person making or doing research on biostatistics.
  • biostratigraphy26n. The study of the stratigraphic distribution of fossils.
  • biosurveillance22n. The monitoring of the biological environment, as for example to...
  • biotechnologist23n. A technologist who works in the field of biotechnology.
  • biotherapeutics24n. The field encompassing therapeutic materials produced using biological...
  • bittersweetness20n. The state or condition of being bittersweet.
3,335 rare words that start with BI

The first 300 are shown.

Questions about these words

How many words that start with BI are there?
Word.ws lists 661 words that start with BI, plus 3,335 rare ones.
What are common words that start with BI?
big, bit, bill, biggest, birth, birthday, bird and bible.
Which of the words that start with BI has the highest letter score?
bioequivalence scores 30 points with the standard letter tile values.

Related word lists

Source and license

Word lists and meanings adapted from the Wiktionary entry of each word. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws left out names, abbreviations, misspellings and offensive words, and ordered the most common words by how often they appear in English (wordfreq). Meanings from Wiktionary; this is not an official Scrabble, Words With Friends or Wordle word list. Wiktionary data of 2026-09-02.

Cite this page: “Words That Start with BI: 661 Words by Length.” Word.ws, https://word.ws/words/starting-with-bi. Based on Wiktionary, CC BY-SA 4.0.