9-Letter Words Starting with I

All 399 nine-letter words that start with I

IB

• ibrutinib13n. A targeted covalent inhibitor of Bruton's tyrosine kinase and hence...
• ibuprofen16n. A synthetic compound used widely as an analgesic and anti-inflammatory...

IC

• ichneumon16n. An Egyptian mongoose (Herpestes ichneumon), found in Africa and...
• iconicity16n. The state of being iconic (in all meanings).
• iconology15n. The study of icons in art or art history.

ID

• idealized20adj. Regarded as ideal.
• identical12adj. Bearing full likeness by having precisely the same set of...
• identikit14n. A picture of a person, reconstructed from strips showing facial...
• ideograph16n. Synonym of ideogram.
• ideologic13adj. Ideological.
• ideologue11n. One who advocates an ideology, especially as an official or preeminent...
• ideomotor12adj. Of or pertaining to involuntary actions caused by subconscious thought.
• idiocracy17n. A government run by idiots.
• idiomatic14adj. Pertaining or conforming to idiom, the natural mode of expression of a...

IG

• ignitable12adj. Capable of being ignited; able to burn.
• ignorable12adj. Able to be ignored.
• ignoramus12n. A totally ignorant person—unknowledgeable, uneducated, or uninformed; a...
• ignorance12n. The condition of being uninformed or uneducated; lack of knowledge or...
• iguanodon11n. Any large dinosaur of the genus †Iguanodon, of the Jurassic and...

IL

• ileostomy14n. The surgical operation of attaching the ileum to the abdominal wall at...
• iliopsoas11n. A compound muscle composed of the iliac and psoas muscles.
• illegally13adv. In a manner contrary to law.
• illegible12adj. Not clear enough to be read; unreadable; not legible or decipherable.
• illegibly15adv. In a manner that produces illegible results.
• illiberal11adj. Restricting or failing to sufficiently promote individual choice and...
• illicitly14adv. In an illicit manner; illegally, immorally, or inappropriately.
• illogical12adj. Contrary to logic; lacking sense or sound reasoning.
• illumined12adj. Illuminated.
• ilustrado10n. An educated wealthy and elite Filipino during the Spanish colonial...

IM

• imaginary15adj. Existing only in the imagination.
• imaginate12adj. Imaginative.
• imagining13n. Something imagined; a figment of the imagination.
• imagistic14adj. Of or pertaining to imagism.
• imbalance15n. The property of not being in balance.
• imbecilic17adj. Like or as an imbecile; so senseless as to be laughable; absurd...
• imbricate15v. To overlap in a regular pattern.
• imbroglio14n. A complicated situation; an entanglement.
• imidazole21n. A heterocyclic organic compound containing two nitrogen atoms separated...
• imiquimod23n. A particular topical immune-response modifier.
• imitating12n. An instance of imitation.
• imitation11n. The act of imitating.
• imitative14adj. Imitating; copying; not original.
• immanence15n. The state of being immanent; inherency.
• immediacy19n. The quality of being immediate, of happening right away.
• immediate14adj. Happening right away, instantly, with no delay.
• immensely16adv. Greatly; hugely; extremely; vastly; to a great extent.
• immensity16n. The characteristic or state of being immense.
• immersion13n. The total submerging of a person in water as an act of baptism.
• immersive16adj. Tending to immerse.
• immigrant14n. A non-native person who comes to a country from another country to...
• immigrate14v. To move into a foreign country to stay permanently.
• imminence15n. The state or condition of being about to happen; imminent quality.
• immodesty17n. The state of being immodest; a lack of modesty.
• immorally16adv. In an immoral manner, not morally, wrongly.
• immovable18adj. Incapable of being physically moved: fixed.
• immovably21adv. In an immovable manner.
• immunogen14n. Any substance that elicits an immune response; an antigen.
• immutable15adj. Unable to be changed without exception.
• immutably18adv. In an immutable manner. In a way that cannot be varied, or changed.
• impactful18adj. Having impact.
• impaction15n. A compression; the packing together of loose matter.
• impairing14n. Impairment.
• impartial13adj. Treating all parties, rivals, or disputants equally; not partial; not...
• imparting14n. Communication (a giving or sharing of information etc).
• impassive16adj. Having, or revealing, no emotion.
• impatiens13n. Any of various ornamental plants of the genus Impatiens.
• impatient13adj. Restless, short of temper, and intolerant of delays.
• impeached19v. Removed from office in accordance with Article II, Section 4 of the...
• impedance16n. The act of impeding; that which impedes; a hindrance.
• impelling14adj. Causing forward motion or action.
• impending15adj. Approaching; drawing near; about to happen or expected to happen.
• imperator13n. An emperor.
• imperfect18adj. Not perfect.
• imperiled14adj. At risk of becoming extinct.
• imperious13adj. Domineering, arrogant, or overbearing.
• impetuous13adj. Making arbitrary decisions, especially in an impulsive and forceful...
• impinging15n. An impingement.
• impiously16adv. In an impious manner; profanely; wickedly.
• implement15v. To bring about; to put into practice; to carry out.
• implicate15v. To show to be connected or involved in an unfavorable or criminal way.
• impliedly17adv. In an implied manner; by implication.
• imploring14n. The act of one who implores; imploration.
• implosion13n. The inrush of air in forming a suction stop.
• implosive16adj. Formed by implosion.
• impolitic15adj. Not in accordance with good policy.
• important13adj. Having relevant and crucial value; having import.
• importune13v. To bother, irritate, trouble.
• imposture13n. The act or conduct of an impostor; deception practiced under a false or...
• impotence15n. Powerlessness; incapacity.
• impotency18n. Impotence.
• imprecise15adj. Not precise or exact; containing some error or uncertainty.
• impressed14adj. Strongly affected, especially favourably.
• impressum15n. A statement of the ownership and authorship of a document, which must...
• imprinted14adj. Stamped or impressed.
• impromptu17adj. Improvised; without prior preparation, planning, or rehearsal.
• improving17adj. That tends to improve someone or something (especially (dated) to...
• improvise16v. To make something up or invent it as one goes on; to proceed guided...
• imprudent14adj. Not prudent; lacking prudence or discretion; indiscreet; injudicious...
• impudence16n. The quality of being impudent, not showing due respect.
• impulsion13n. The act of impelling or driving onward, or the state of being impelled...
• impulsive16adj. Having the power of driving or impelling; giving an impulse; moving...
• imputable15adj. That may be imputed.

IN

• inability14n. Lack of the ability to do something; incapability.
• inamorata11n. A female lover or woman with whom one is in love; a mistress.
• inanimate11adj. Lacking the quality or ability of motion; as an inanimate object.
• inaudible12adj. Unable to be heard or not loud enough to be heard.
• inaudibly15adv. In a manner which is incapable of being heard or not loud enough to be...
• inaugural10adj. Of inauguration; as in a speech or lecture by the person being...
• incapable15adj. Not capable (of doing something); unable.
• incarnate11adj. Embodied in flesh; given a bodily, especially a human, form...
• incentive14n. Something that motivates, rouses, or encourages.
• inception13n. The creation or beginning of something; the establishment.
• inceptive16adj. Beginning; of or relating to inception.
• incessant11adj. Without pause or stop; not ending, especially to the point of annoyance.
• incestual11adj. Incestuous.
• incidence14n. The act of something happening; occurrence.
• incipient13adj. In an initial stage; beginning, starting, coming into existence.
• inciteful14adj. That incites (rouses, stirs up or excites), or provides incitement.
• inclement13adj. Stormy, of rough weather; not clement.
• inclining12n. Inclination.
• including13prep. Such as, among which; introducing one or more parts of the group or...
• inclusion11n. An addition or annex to a group, set, or total.
• inclusive14adj. Including (almost) everything within its scope.
• incognita12n. A woman who is unknown or in disguise.
• incognito12adj. Without being known; in an assumed character, or under an assumed...
• incorrect13adj. Not correct; erroneous or wrong.
• incorrupt13adj. Not corrupt, void of moral corruption.
• increaser11n. One who, or that which, increases.
• increment13n. The action of increasing or becoming greater.
• incubator13n. Any apparatus used to maintain environmental conditions suitable for a...
• inculcate13v. To teach by repeated instruction.
• incumbent15adj. Chiefly followed by on or upon: leaning, or lying, reclining, or...
• incurable13adj. Of an illness, condition, etc, that is unable to be cured; healless.
• incurably16adv. In an incurable manner.
• incurious11adj. Lacking interest or curiosity; uninterested.
• incursion11n. A military action consisting of armed forces of one geopolitical entity...
• indecency17n. Lack of decency; the property or degree of being indecent.
• indelible12adj. Having the quality of being difficult to delete, remove, wash away...
• indelibly15adv. In an indelible manner.
• indemnify18v. To secure against loss or damage; to insure.
• indemnity15n. Security from damage, loss, or penalty.
• indenting11n. Indentation.
• indention10n. The process of indenting.
• indenture10n. A contract which binds a person to work for another, under specified...
• indexable19adj. That can be indexed.
• indexical19adj. Of, pertaining to, or like, an index; having the form of an index.
• indicator12n. A pointer or index that indicates something.
• indiction12n. A fiscal period of fifteen years, instituted by Constantine in 313 C.E....
• indigence13n. Extreme poverty or destitution.
• indignant11adj. Showing anger or indignation, especially at something unjust or wrong.
• indignity14n. Degradation, debasement or humiliation.
• indinavir13n. An antiretroviral drug C₃₆H₄₇N₅O₄ of the protease inhibitor class that...
• indolence12n. Habitual laziness or sloth.
• inducible14adj. Able to be activated, induced, or caused.
• induction12n. An act of inducting.
• inductive15adj. Of, or relating to logical induction, by generalizing a universal claim...
• indulgent11adj. Disposed or prone to indulge, humor, gratify, or yield to one's own or...
• indurated11adj. Hardened in character.
• inebriate11n. A person who is intoxicated, especially one who is habitually drunk.
• inebriety14n. The state of being inebriated; inebriation, drunkenness.
• ineffable17adj. Beyond expression in words; unspeakable.
• ineffably20adv. Indescribably; to a very great degree or extent.
• inelastic11adj. Lacking elasticity; inflexible, unyielding.
• inelegant10adj. Not elegant; not exhibiting neatness, refinement, or precision.
• ineptness11n. The quality or degree of being inept.
• inerrancy14n. Freedom from error.
• inertness9n. Lack of activity or exertion; habitual indisposition to action or...
• infalling13adj. Moving towards a massive astronomical body under the influence of...
• infantile12adj. Pertaining to infants.
• infarcted15adj. Affected by infarcts.
• infatuate12v. To inspire with unreasoning love, attachment or enthusiasm.
• infection14n. The act or process of infecting.
• infective17adj. Able to cause infection; infectious.
• inference14n. The act or process of inferring by deduction or induction.
• inferring13n. The act of one who infers something; the drawing of an inference.
• infertile12adj. Not fertile.
• infielder13n. A player who plays in the infield, which is the inner portion of the...
• infilling13n. Infilled material.
• infirmary17n. A place where sick or injured people are cared for, especially a small...
• infirmity17n. Feebleness, frailty or ailment, especially due to old age.
• inflaming15adj. Tending to arouse strong emotions; tending to inflame.
• inflation12n. An act, instance of, or state of expansion or increase in size...
• inflected15adj. Deviating from a straight line.
• inflexion19n. Dated spelling of inflection.
• inflowing16n. The act or process of flowing in; an inflow.
• influence14n. The power to affect, control or manipulate something or someone; the...
• influenza21n. An acute contagious disease of the upper airways and lungs, caused by a...
• informant14n. One who relays confidential information to someone, especially to the...
• informing15adj. Informative; educational.
• infringed14adj. Of a treaty, law, right, etc., broken or violated.
• infringer13n. One who infringes.
• infuriate12v. To make furious or mad with anger; to fill with fury.
• ingenious10adj. Of a person, displaying genius, ingenuity or brilliance; inventive.
• ingenuity13n. The ability to solve difficult problems in original, clever, and...
• ingenuous10adj. Naive and trusting.
• ingestion10n. The process of ingesting, or consuming something orally, whether it be...
• ingestive13adj. Of or pertaining to ingestion.
• inglenook14n. A nook or corner beside an open fireplace; a chimney corner.
• ingleside11adj. Beside an open fireplace.
• ingrained11adj. Being an element; present in the essence of a thing.
• ingrowing14adj. Growing inwards or abnormally towards (a part of the body).
• inhabited15adj. Having inhabitants; lived in.
• inhalable14adj. That can be inhaled.
• inherence14n. The state of being inherent or permanently present in something...
• inherited13adj. Obtained via an inheritance.
• inheritor12n. Someone who inherits something; an heir.
• inhibited15adj. Reserved or repressed, prone to quiet, inexpressive behavior.
• inhibitor14n. One who, or that which, inhibits.
• inhumanly17adv. In an inhuman manner.
• initialed10adj. Having initials.
• initially12adv. At the beginning.
• initiator9n. One who initiates.
• injection18n. The act of injecting, or something that is injected.
• injective21adj. Of, relating to, or being an injection: such that each element of the...
• injurious16adj. Causing physical harm or injury; harmful, hurtful.
• injustice18n. Absence of justice; unjustice.
• innermost11n. That which is innermost; the core.
• innervate12v. To supply (an organ or part of the body) with nerves.
• innkeeper15n. The person responsible for the running of an inn, usually the...
• innocence13n. Absence of responsibility for a crime, tort, etc.
• innocency16n. Harmlessness.
• innocente11n. Synonym of robe volante.
• innocuous11adj. Harmless; producing no ill effect.
• innovator12n. Someone who innovates; a creator of new ideas.
• inoculant11n. The active material used in an inoculation; an inoculum.
• inoculate11v. To introduce an antigenic substance or vaccine into something (e.g. the...
• inorganic12adj. Relating to a compound that does not contain carbon.
• inotropic13adj. Increasing or decreasing the force of muscular contractions.
• inpatient11n. A patient whose treatment requires at least one night's residence in a...
• inquiring19n. Inquiry.
• insatiate9adj. That is not satiated; insatiable.
• insectoid12adj. Insect-like.
• insensate9adj. Having no sensation or consciousness; unconscious; inanimate.
• inserting10n. Something inserted or set in, such as lace in garments.
• insertion9n. The act of inserting, or something inserted.
• insertive12adj. Of or relating to insertion, especially in regard to sexual acts.
• inservice14n. In-service training.
• inshallah15interj. Expressing the speaker’s wish for a given future event to occur, and...
• insidious10adj. Causing harm in a stealthy, often gradual, manner.
• insincere11adj. Expressing words or behaviors that one does not genuinely feel or...
• insinuate9v. To hint; to suggest tacitly (usually something bad) while avoiding a...
• insistent9adj. Urgent in dwelling upon anything; persistent in urging or maintaining.
• insisting10adj. Synonym of insistent.
• insolence11n. Contemptible, ill-mannered conduct; insulting: arrogant, bold behaviour...
• insoluble11adj. That cannot be dissolved.
• insolvent12adj. Unable to pay one's bills as they fall due.
• insomniac13n. One who suffers an inability or difficulty sleeping; a sufferer from...
• inspector13n. A person employed to inspect something.
• inspiring12adj. Providing inspiration; encouraging; stimulating.
• installed10v. Readied for use.
• installer9n. One who installs.
• instanter9adv. Immediately; instantly; without delay.
• instantly12adv. At once; without delay.
• instanton9n. A solution to the imaginary time nonlinear field equation of Yang-Mills...
• instigate10v. To bring about by urging or encouraging.
• institute9n. An organization founded to promote a cause.
• instructs11n. Shortened form of instructions.
• insulated10adj. Protected from heat, cold, noise etc, by being surrounded with an...
• insulator9n. A substance that does not transmit heat (thermal insulator), sound...
• insulting10adj. Containing insult, or having the intention of insulting.
• insurable11adj. Capable of being insured.
• insurance11n. A means of indemnity against a future occurrence of an uncertain event.
• insurgent10adj. Rebellious, opposing authority.
• insurtech14n. The use of information technology in the insurance industry.
• integrand11n. The function that is to be integrated.
• integrase10n. Any enzyme that integrates viral DNA into that of an infected cell.
• integrate10v. To include as a constituent part or functionality.
• integrity13n. Steadfast adherence to a strict moral or ethical code.
• intellect11n. The faculty of thinking, judging, abstract reasoning, and conceptual...
• intendant10n. The administrator of an opera house or theater.
• intending11n. The process by which one intends something; intention.
• intensely12adv. In an intense manner.
• intensify15v. To render more intense.
• intension9n. Intensity or the act of becoming intense.
• intensity12n. The quality of being intense.
• intensive12adj. Done with intensity or to a great degree; thorough.
• intention9n. A course of action that a person intends to follow.
• interband12adj. Describing a region between bands (magnetic, spectral etc).
• interbank15adj. Of, pertaining to, or taking place between two or more banks (financial...
• interbody15adj. Between bodies.
• intercede12v. To plead on someone else's behalf.
• intercept13v. To stop, deflect or divert (something in progress or motion).
• intercity14adj. Between cities; connecting cities with other cities.
• interclub13adj. Between clubs.
• interdict12n. A papal decree prohibiting the administration of the sacraments from a...
• interests9n. The persons interested in any particular business or cause, taken...
• interface14n. The point of interconnection or contact between entities.
• interfere12v. To get involved or involve oneself, causing disturbance.
• intergang11adj. Between gangs.
• interject18v. To insert something between other things.
• interlace11n. A decorative element found especially in early medieval art.
• interlake13adj. Between lakes.
• interline9adj. Between lines.
• interlink13v. To link together.
• interlock15v. To fit or clasp together securely.
• interlude10n. An intervening episode, etc.
• interment11n. The act of burying a dead body; burial.
• intermont11adj. Between mountains; intermontane.
• internals9n. The internal workings of a mechanism or system that are normally hidden...
• internets9n. The Internet.
• interning10n. Practice of always using references instead of copies of equal objects.
• internist9n. A physician who specialises in internal medicine.
• internode10adj. Between nodes.
• interplay14n. Interaction; reciprocal relationship.
• interpose11v. To insert something (or oneself) between other things.
• interpret11v. To decode the meaning of a topic and then act, whether to continue...
• interrail9v. To travel using the InterRail rail pass.
• interring10n. A burial.
• interrupt11v. To disturb or halt (an ongoing process or action, or the person...
• intersect11v. To cut into or between; to cut or cross mutually; to divide into parts.
• intership14adj. Between ships.
• intertype14adj. Between data types.
• intervale12n. An alluvial terrace or plain.
• intervene12v. To become involved in a situation, so as to alter or prevent an action.
• interview15n. Any face-to-face meeting, especially of an official or adversarial...
• interzone18n. A position between neighbouring zones.
• intestacy14n. The state of being intestate, or of dying without having made a valid...
• intestate9adj. Without a valid will indicating whom to leave one's estate to after...
• intestine9n. The alimentary canal of an animal through which food passes after...
• intracity14adj. Within a city.
• intraoral9adj. Within the mouth.
• intricacy16n. The state or quality of being intricate or entangled.
• intricate11adj. Having a great deal of fine detail or complexity.
• intriguer10n. One who intrigues; one who forms plots, or pursues an object by secret...
• intrinsic11adj. Innate, inherent, inseparable from the thing itself, essential.
• introduce12v. To cause (someone) to be acquainted (with someone else).
• introitus9n. The entrance to a hollow organ or canal; often specifically the...
• introvert12n. An organ or other body part that is or can be turned inside out...
• intruding11n. Intrusion.
• intrusion9n. The forcible inclusion or entry of an external group or individual; the...
• intrusive12adj. Tending to intrude; doing that which is not welcome; interrupting or...
• intuiting10n. An instance of intuition.
• intuition9n. Immediate cognition without the use of conscious rational processes.
• intuitive12adj. Spontaneous, without requiring conscious thought.
• inundated11adj. Flooded.
• invalidly16adv. In an invalid manner; without validity.
• invariant12adj. Not varying; constant.
• invective17n. An expression which inveighs or rails against a person.
• invention12n. Something invented.
• inventive15adj. Of, or relating to invention; pertaining to the act of devising new...
• inventory15n. The stock of an item on hand at a particular location or business.
• inversely15adv. In an inverse order or manner; by inversion.
• inversion12n. The action of inverting.
• inversive15adj. Of, pertaining to, characterised by, or causing inversion.
• invertase12n. An enzyme that catalyzes the hydrolysis of sucrose into glucose and...
• inverting13adj. That inverts.
• investing13n. The act of something being invested; an investment.
• invidious13adj. Causing ill will, envy, or offense.
• inviolate12adj. Not violated; free from violation or hurt of any kind; secure against...
• invisible14adj. Unable to be seen; out of sight; not visible.
• invisibly17adv. In a way that can not be seen; in an invisible manner.
• invoicing15n. The issuing of an invoice.
• involucre14n. Conspicuous bract, bract pair or ring of bracts at the base of an...

IO

• iodinated11adj. Treated or reacted with iodine or hydroiodic acid.
• ionizable20adj. Capable of being ionized.
• ionophore14n. Any substance that can transfer ions from a hydrophilic medium (such as...

IR

• irascible13adj. Easily provoked to outbursts of anger; irritable.
• iridology14n. A form of alternative medicine involving the diagnosis of body ailments...
• ironbound12adj. Bound with iron, ironclad.
• ironsmith14n. A blacksmith (who makes articles from iron).
• ironstone9n. Any ore of iron which is impure through the admixture of silica or clay.
• ironworks16n. A factory in which iron is manufactured or iron goods are made.
• irradiate10adj. Made brilliant or bright; irradiated, illuminated.
• irregular10adj. Nonstandard; not conforming to rules or expectations.
• irrigable12adj. Able to be irrigated.
• irrigator10n. One who, or that which, irrigates.
• irritable11adj. Capable of being irritated.
• irritably14adv. In an irritable manner.
• irritated10adj. Experiencing a feeling of irritation.
• irruption11n. The action of irrupting or breaking into; a violent entry or invasion...
• irruptive14adj. Having the quality of irrupting or making irruptions.

IS

• ischaemic18adj. British English spelling of ischemic.
• isinglass10n. A form of gelatin obtained from the air bladder of the sturgeon and...
• islanding11n. The condition of a distributed generation (DG) generator continuing to...
• isobutane11n. A hydrocarbon, a particular isomer of C₄H₁₀ found in natural gas.
• isobutene11n. The unsaturated hydrocarbon methylpropene, (CH₃)₂C=CH₂; used in the...
• isochoric16adj. Having the same volume.
• isochrone14n. An isoline on a map or chart connecting points that have the same value...
• isoenzyme23n. Any of a group of enzymes that catalyze the same reaction but have...
• isolating10adj. Having low morpheme per word ratio and no inflectional morphemes.
• isolation9n. The state of being isolated, detached, or separated; the state of being...
• isomerase11n. Any enzyme which catalyzes the conversion of one isomeric form of a...
• isomerism13n. The phenomenon of the existence of isomers - the existence of different...
• isomerize20v. To convert a compound into a different isomeric form.
• isometric13adj. Of or exhibiting equality in dimensions.
• isoniazid19n. A synthetic, crystalline compound, C₆H₇N₃O, (trademarks Hydra, Hyzyd...
• isopropyl16n. The univalent organic radical (CH₃)₂CH-.
• isosceles11adj. Having (at least) two sides of equal length, used especially of a...
• isostatic11n. A line of constant stress.
• isosteric11adj. Of or pertaining to isosteres.
• isotropic13adj. Having properties that are identical in all directions; exhibiting...

IT

• italicize20v. To put into italics.
• itchiness14n. The state of being itchy.
• itemizing21n. The process by which something is itemized.
• iteration9n. A recital or a second performance; a repetition.
• iterative12adj. Of a procedure that involves repetition of steps (iteration) to achieve...
• itinerant9adj. Habitually travelling from place to place.
• itinerary12n. A written schedule of activities for a vacation or road trip.

IV

• ivacaftor17n. A drug used to treat certain forms of cystic fibrosis.

Questions about these words

How many nine-letter words that start with I are there?

Word.ws lists 399 nine-letter words that start with I, plus 1,149 rare ones.

What are common nine-letter words that start with I?

including, important, insurance, interview, institute, influence, interests and immediate.

Which of the nine-letter words that start with I has the highest letter score?

isoenzyme scores 23 points with the standard letter tile values.

Related word lists

• 9-Letter Words
• Words That Start with I
• 8-Letter Words Starting with I
• 10-Letter Words Starting with I
• Q Words Without U