12-Letter Words Starting with B
There are 146 twelve-letter words that start with B on Word.ws, from bachelorette to butyllithium. The most common are broadcasting, breakthrough, bibliography, breathtaking and biodiversity.
Meanings from Wiktionary. Not an official Scrabble, Words With Friends or Wordle word list.
All 146 twelve-letter words that start with B
BA
- bachelorette19n. An unmarried woman.
- bachelorhood23n. The condition of being a bachelor.
- backbreaking27adj. Of work, very physically tiring.
- backcrossing23n. The crossing of a hybrid with one of its parents or an individual...
- backgrounded23adj. Moved to the background.
- backgrounder22n. A briefing or document typically provided prior to a meeting or other...
- backlighting25n. The illumination of a photographic subject from the rear, causing edges...
- backpedaling24n. The act of distancing oneself from a previously supported idea, action...
- backpressure22n. Pressure that is opposed to the desired flow of a fluid (through a...
- backslapping25n. Action of the verb to backslap.
- backstabbing25n. The act of one who backstabs.
- backstepping25n. A technique for designing stabilizing controls for a special recursive...
- backtracking27n. The act of one who, or that which, backtracks; a retracing of one's...
- backwardness24n. The state of being backward.
- backwoodsman26n. A person who is acclimated to living in a forest area that is far...
- bactericidal19adj. That kills bacteria.
- bacteriology20n. The scientific study of bacteria, especially in relation to disease and...
- ballhandling19n. Skillful handling of the basketball when dribbling, passing or...
- balustrading16n. Work including one or more balustrades.
- bandwagoning20n. The practice of joining the prevailing side.
- bantamweight23n. A weight class in boxing and other sports, intermediate between...
- barbarianism18n. A primitive or simplistic ethos or societal condition; barbarism.
- barbarically21adv. In a barbaric manner.
- barcalounger17n. A plush stuffed recliner armchair.
- barnstorming17adj. Highly theatrical.
- baroreceptor18n. A nerve ending that is sensitive to changes in blood pressure.
- basilosaurus14n. Any species of several huge extinct cetaceans belonging to the genus...
- basketballer20n. A basketball player; a person who plays basketball.
- bastardizing25n. The act or process by which something is bastardized.
- bathypelagic25adj. Of or pertaining to the parts of the oceans at depths between 1000 and...
- battleground16n. A location where a battle may be fought, or has been fought.
- battlemented17adj. Furnished with battlements, as the ramparts of a city or castle.
BE
- beachcombing26n. The lifestyle and habits of a beachcomber.
- beatifically22adv. In a beatific manner.
- beatmatching22n. The synchronization of beats in two pieces of music, as performed by a...
- befuddlement21n. The state of being befuddled; a feeling of being dazed and perplexed...
- begrudgingly21adv. In a begrudging manner; in a manner that is envious or reluctant.
- behaviorally23adv. With respect to behavior.
- behaviourism22n. Behaviorism (an approach focusing on observable behavior which...
- behaviourist20n. Behaviorist (one who studies behavior of humans or animals).
- belittlement16n. An act of belittling.
- belligerence17n. The state of being belligerent; aggressive inclination to war or...
- benchmarking26n. A performance measurement according to a benchmark.
- benefactress19n. A female benefactor.
- beneficially22adv. In a beneficial manner.
- benevolently20adv. In a benevolent manner.
- benzaldehyde31n. A chemical compound (C₆H₅CHO) consisting of a benzene ring with an...
- benzalkonium29n. Any of a class of quaternary ammonium cations containing a benzyl, two...
- benzophenone28n. Any of a class of aromatic ketones based on the parent compound...
- benzoquinone32n. Either of the two isomeric forms of the simplest quinone, C₆H₄O₂, or...
- bespectacled21adj. Wearing spectacles (glasses).
- bewilderment20n. The state of being bewildered.
- bewitchingly26adv. In a bewitching manner.
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...
BL
- blabbermouth23n. A kind of foam-dispensing nozzle used in firefighting at airports.
- blackballing23n. An instance, or action, of a person being blackballed.
- blackcurrant22n. A shrub, Ribes nigrum, that produces small, very dark purple, edible...
- blacklisting21n. The act of placing onto a blacklist.
- blackmailing23n. The act of one who blackmails.
- blindfolding20n. The act of covering with a blindfold.
- blissfulness17n. The characteristic of being blissful.
- blisteringly18adv. In a blistering manner.
- blockbusting23n. A technique used to encourage people to sell their property by giving...
- blogiversary21n. The anniversary of one's first blog post.
- bloodletting16n. The archaic practice of treating illness by removing some blood...
- bloodstained16adj. Stained, spotted or otherwise discolored with blood.
- bloodsucking22adj. That draws off the blood of another animal, or a person.
- bloodthirsty21adj. Thirsty for blood: inexorably violent or eager for bloodshed; murderous.
- bluestocking21n. A member of an 18th-century Blue Stockings Society.
BO
- boastfulness17n. The characteristic of being boastful.
- boatbuilding18n. The construction of a boat or boats.
- bodyboarding22n. A water sport, similar to surfing, in which one kneels or lies on a...
- bodybuilding22n. A sport in which the aesthetics of muscular development is the basis...
- bodystocking25n. A one-piece article of lingerie, resembling stockings or pantyhose but...
- boisterously17adv. In a boisterous manner, energetically and noisily.
- bootylicious19adj. Voluptuously attractive, especially of a woman's buttocks.
- borosilicate16n. Any of various minerals whose structure is formally that of a dual salt...
- boulevardier18n. A man who frequents the boulevards; thus, a man about town or bon...
BR
- bracketology24n. The practice of predicting and analyzing sports tournament brackets.
- bradykinesia22n. Slowness of movement.
- brahmacharya27n. The first (student) ashrama in Hindu culture in which a person is...
- brainwashing21n. A form of indoctrination that forces people to abandon their beliefs in...
- breadwinning19n. The earning of a household's primary income.
- breakdancing22n. An urban style of acrobatic street dance that originated in the hip hop...
- breakfasting22n. The act of eating breakfast.
- breakthrough25adj. Characterized by major progress or overcoming some obstacle.
- breaststroke18n. A swimming stroke in which the swimmer lies face down, the arms being...
- breathalyzer29n. A device that measures alcohol in expired air so as to estimate the...
- breathlessly20adv. In a breathless manner, usually due to excitement, exertion, etc.
- breathtaking22adj. Stunningly beautiful; amazing.
- brilliantine14n. A hair pomade, making the hair shine brilliantly.
- brinkmanship25n. The pursuit of an advantage by appearing to be willing to take a matter...
- broadcasting18adj. Sending in all directions.
- bronchoscope23n. A form of endoscope for inspecting the bronchial tubes.
- bronchoscopy26n. A technique for viewing the bronchi using a flexible instrument called...
- bronchospasm23n. Difficulty in breathing due to a contraction of smooth muscle in the...
- brontosaurus14n. Any member of the genus †Brontosaurus of herbivorous sauropod dinosaurs...
BU
- buccaneering19adj. Bold, reckless and unscrupulous.
- bullfighting22n. A traditional spectacle, popular in Spain and many former Spanish...
- bureaucratic18adj. Of or pertaining to bureaucracy or the actions of bureaucrats.
- bushwhacking30n. Travelling through thick wooded country, cutting away scrub to make...
- businesslike18adj. Methodical and efficient, in a way that would be advantageous to a...
- butterfinger18n. Synonym of butterfingers (“someone who tends to drop things; (more...
- butterscotch21n. A hard candy made from butter, brown sugar, syrup and vanilla.
- buttonwillow20n. A shrub with round flower heads found near water in California, the...
- butyllithium22n. Any of three isomeric organolithium reagents used in chemical synthesis.
1,298 rare twelve-letter words that start with B
- bababudanite
- babealicious
- babelization
- babingtonite
- babyfication
- babylessness
- babyproofing
- baccalaurean
- bacchanalist
- bacchanalize
- bacchanology
- bachelorlike
- bachelorship
- bachelorwise
- bacillicidal
- bacillicidic
- bacillithiol
- bacillolysin
- bacillomycin
- bacillomyxin
- bacilloscopy
- bacilosarcin
- backbitingly
- backboneless
- backcourtman
- backdonation
- backdrivable
- backgammoner
- backgrinding
- backhandedly
- backlayering
- backlessness
- backmutation
- backpackable
- backportable
- backreacting
- backreaction
- backsolution
- backsolvable
- backsourcing
- backstromite
- backswimming
- backswording
- backswordman
- backtransfer
- backwardated
- backwashable
- backwaterish
- bacterialess
- bacterialike
- bactericidin
- bacteriocyte
- bacteriogram
- bacterioidal
- bacteriolyse
- bacteriosome
- bacteriostat
- bacteroidete
- bactofection
- bactopeptone
- bactriticone
- baculiferous
- badmintonist
- bafflingness
- baggywrinkle
- bagrationite
- baileychlore
- bakelization
- balamuthosis
- balancedness
- balangeroite
- balaniferous
- balanitoside
- balanophorin
- balanoplasty
- balenopterid
- balladmonger
- ballerinadom
- balletically
- balletomania
- balliranoite
- ballistarius
- ballistician
- ballisticity
- ballochorous
- ballonnement
- ballooningly
- balloonplant
- balloonsonde
- ballotechnic
- ballottement
- balneability
- balneography
- balneologist
- balofloxacin
- balsamically
- baltoceratid
- baluchimyine
- balusterlike
- balustriform
- bambocciante
- bamboozlable
- bamlanivimab
- banalisation
- banalization
- bananaphobia
- bananivorous
- bancroftosis
- banderillero
- bandlessness
- bandlimiting
- bandmistress
- bandoneonist
- bandstration
- bandstrength
- bandwagoneer
- bandwagonism
- banisterioid
- banjoleleist
- bankeraceous
- banklessness
- bankruptlike
- bankruptness
- bankruptship
- bannermanite
- bannisterite
- banyangvirus
- bapineuzumab
- baptornithid
- baraminology
- barbaralalia
- barbarianess
- barbariously
- barbarocracy
- barbellately
- barbellulate
- barbermonger
- barbershoppy
- barbertonite
- barbexaclone
- barblessness
- bardolatrous
- barehandedly
- barfalicious
- barfogenesis
- bariatrician
- baritonality
- barkevikitic
- barkitecture
- barklessness
- barnaclelike
- barndominium
- barnhardtite
- baroafferent
- barocalorics
- barodynamics
- barometrical
- barophysical
- baroselenite
- barotolerant
- barratrously
- barrelmaking
- barrelmancer
- barringerite
- barristerial
- barristering
- baryogenesis
- baryonychine
- basaltically
- basaluminite
- basapophysis
- baseboarding
- baselessness
- basellaceous
- bashlessness
- basialveolar
- basicapsular
- basidiophore
- basidiospore
- basification
- basikuloside
- basilectally
- basileolatry
- basilisklike
- basilosaurid
- basimglurant
- basinhopping
- basisphenoid
- basistipital
- basitemporal
- basitrichous
- basketflower
- basketmaking
- basketweaver
- basocatenate
- basocellular
- basogranulin
- basosquamous
- basotemporal
- bassiacridin
- bassianolide
- basslessness
- batchelorite
- batefenterol
- bathetically
- bathlessness
- bathmophobia
- bathmotropic
- bathochromic
- bathophilous
- bathroomette
- bathroomgoer
- bathroomless
- bathroomlike
- bathroomware
- bathybenthic
- bathycheilid
- bathyclupeid
- bathycolpous
- bathygraphic
- bathykolpian
- bathylimnion
- bathymetrist
- bathyspheric
- bathyteuthid
- batrachoidid
- batrachology
- battlemaster
- battleshippy
- battlesuited
- battlesuiter
- battleworthy
- battological
- baumhauerite
- baumstarkite
- baurusuchine
- bazedoxifene
- beachrolling
- beaklessness
- beancounting
- beanlessness
- beanspilling
- bearableness
- bearlessness
- bearlikeness
- beastfulness
- beastishness
- beatlessness
- beaumontague
- beautifiable
- beauverolide
- bebtelovimab
- becardiganed
- beclofibrate
- beclotiamine
- becomingness
- becompliment
- becquerelite
- becquerelium
- becrinolined
- becurtovirus
- bedaughtered
- bedazzlement
- bedazzlingly
- bedlamitical
- bedraggledly
- beeflessness
- beepocalypse
- beerlessness
- beflubutamid
- beforestated
- befountained
- befriendable
- befriendment
- befuddlingly
- befurbelowed
- beggarliness
- beglerbeglic
- begoniaceous
- begottenness
- begrudgement
- behavioremic
- behaviorwise
- behavioureme
- beholdenness
- belabouredly
- belaperidone
- believerhood
- belinkedness
- belipsticked
- belittlingly
- belladonnine
- belletristic
- bellfounding
- bellingerite
- bellipotence
- bellowsmaker
- bellyscraper
- belonephobia
- belongership
The first 300 are shown.
Questions about these words
- How many twelve-letter words that start with B are there?
- Word.ws lists 146 twelve-letter words that start with B, plus 1,298 rare ones.
- What are common twelve-letter words that start with B?
- broadcasting, breakthrough, bibliography, breathtaking, biodiversity, bureaucratic, biographical and biochemistry.
- Which of the twelve-letter words that start with B has the highest letter score?
- benzoquinone scores 32 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: “12-Letter Words Starting with B: 146 Words.” Word.ws, https://word.ws/words/12-letter/starting-with-b. Based on Wiktionary, CC BY-SA 4.0.