13-letter words starting with I
Embark on a linguistic journey with words that begin with the letter I. This section showcases how I at the start shapes the identity and sound of various words. From commonly used terms to rare finds, explore the diverse range of words that start with I, enriching your vocabulary and appreciation for language.
| Word | Points | Definition | Sentence example |
|---|---|---|---|
| investigation | 17 | the work of inquiring into something thoroughly and systematically | - |
| international | 13 | from or between other countries | international trade |
| investigating | 18 | the work of inquiring into something thoroughly and systematically | - |
| interrogation | 14 | a sentence of inquiry that asks for a reply | he had trouble phrasing his interrogations |
| irresponsible | 17 | showing lack of care for consequences | behaved like an irresponsible idiot |
| inappropriate | 19 | not in keeping with what is correct or proper | completely inappropriate behavior |
| inconvenience | 20 | an inconvenient discomfort | - |
| insignificant | 19 | small and unimpressive | an insignificant sum of money |
| intentionally | 16 | with intention; in an intentional manner | he used that word intentionally |
| inexperienced | 25 | lacking practical experience or training | - |
| investigative | 20 | designed to find information or ascertain facts | investigative reporting |
| interrogating | 15 | - | - |
| independently | 20 | apart from others | - |
| instinctively | 21 | as a matter of instinct | he instinctively grabbed the knife |
| inconsiderate | 16 | without proper consideration or reflection | slovenly inconsiderate reasoning |
| indispensable | 18 | absolutely necessary; vitally necessary | an indispensable worker |
| irreplaceable | 19 | impossible to replace | irreplaceable antiques |
| inspirational | 15 | imparting a divine influence on the mind and soul | - |
| inconceivable | 22 | totally unlikely | - |
| incriminating | 18 | charging or suggestive of guilt or blame | - |
| improvisation | 20 | an unplanned expedient | - |
| interestingly | 17 | in an interesting manner | when he ceases to be just interestingly neurotic and...gets locked up |
| individuality | 21 | the quality of being individual | so absorbed by the movement that she lost all sense of individuality |
| industrialist | 14 | someone who manages or has significant financial interest in an industrial enterprise | - |
| impersonating | 18 | - | - |
| institutional | 13 | organized as or forming an institution | institutional religion |
| impossibility | 22 | an alternative that is not available | - |
| indescribable | 20 | defying expression or description | indescribable beauty |
| instantaneous | 13 | occurring with no delay | relief was instantaneous |
| inadvertently | 20 | without knowledge or intention | - |
| intergalactic | 18 | between or among galaxies | intergalactic space |
| incarceration | 17 | the state of being imprisoned | his ignominious incarceration in the local jail |
| incapacitated | 20 | lacking in or deprived of strength or power | - |
| inconspicuous | 19 | not prominent or readily noticeable | he pushed the string through an inconspicuous hole |
| impressionist | 17 | relating to or characteristic of Impressionism | impressionist music |
| impersonation | 17 | a representation of a person that is exaggerated for comic effect | - |
| individualism | 20 | the doctrine that government should not interfere in commercial affairs | - |
| involuntarily | 19 | against your will | he was involuntarily held against his will |
| intelligently | 17 | in an intelligent manner | she acted intelligently in this difficult situation |
| inexhaustible | 25 | that cannot be entirely consumed or used up | an inexhaustible supply of coal |
| ideologically | 20 | - | - |
| incorruptible | 19 | incapable of being morally corrupted | incorruptible judges are the backbone of the society |
| introspective | 20 | given to examining own sensory and perceptual experiences | - |
| insubordinate | 16 | disposed to or engaged in defiance of established authority | - |
| introspection | 17 | the contemplation of your own thoughts and desires and conduct | - |
| irresponsibly | 20 | in an irresponsible manner | he acted irresponsibly |
| indoctrinated | 17 | - | - |
| incorporating | 18 | - | - |
| interpersonal | 15 | occurring among or involving several people | interpersonal situations in which speech occurs |
| infinitesimal | 18 | infinitely or immeasurably small | - |
| informational | 18 | relating to or having the nature of information | - |
| inconsistency | 20 | the relation between propositions that cannot both be true at the same time | - |
| irrationality | 16 | the state of being irrational; lacking powers of understanding | - |
| imperceptible | 23 | impossible or difficult to perceive by the mind or senses | an imperceptible drop in temperature |
| imperceptibly | 26 | in an imperceptible manner or to an imperceptible degree | the power of the Secretary of State in London increased gradually but imperceptibly |
| idiosyncratic | 21 | peculiar to the individual | we all have our own idiosyncratic gestures |
| irrepressible | 17 | impossible to repress or control | an irrepressible chatterbox |
| imperialistic | 19 | of or relating to imperialism | imperialistic wars |
| indifferently | 23 | with indifference; in an indifferent manner | she shrugged indifferently |
| indefatigable | 20 | showing sustained enthusiastic action with unflagging vitality | an indefatigable advocate of equal rights |
| invincibility | 23 | the property being difficult or impossible to defeat | - |
| intravenously | 19 | in an intravenous manner | the patient had to be fed intravenously |
| insufficiency | 26 | lack of an adequate quantity or number | - |
| inevitability | 21 | the quality of being unavoidable | - |
| insensitivity | 19 | the inability to respond to affective changes in your interpersonal environment | - |
| inventiveness | 19 | the power of creative imagination | - |
| impressionism | 19 | a school of late 19th century French painters who pictured appearances by strokes of unmixed colors to give the impression of reflected light | - |
| indisposition | 16 | a certain degree of unwillingness | his hesitancy revealed his basic indisposition |
| indeterminate | 16 | not precisely determined or established; not fixed or known in advance | of indeterminate age |
| interrogative | 17 | a sentence of inquiry that asks for a reply | - |
| insubstantial | 15 | lacking material form or substance; unreal | as insubstantial as a dream |
| infallibility | 21 | the quality of never making an error | - |
| incorporation | 17 | learning (of values or attitudes etc.) that is incorporated within yourself | - |
| instructional | 15 | of or relating to or used in instruction | instructional aids |
| insupportable | 19 | incapable of being justified or explained | - |
| incommunicado | 22 | without the means or right to communicate | a prisoner held incommunicado |
| individualist | 18 | marked by or expressing individuality | an individualistic way of dressing |
| incredulously | 19 | in an incredulous manner | the woman looked up at her incredulously |
| intrinsically | 18 | with respect to its inherent nature | - |
| ichthyologist | 25 | a zoologist who studies fishes | - |
| inflexibility | 28 | a lack of physical flexibility | - |
| inquisitorial | 22 | having the authority to conduct official investigations | the inquisitorial power of the Senate |
| incrimination | 17 | an accusation that you are responsible for some lapse or misdeed | his incrimination was based on my testimony |
| intercultural | 15 | - | - |
| irretrievable | 18 | impossible to recover or recoup or overcome | an irretrievable loss |
| illuminations | 15 | - | - |
| impulsiveness | 20 | the trait of acting suddenly on impulse without reflection | - |
| inexpensively | 28 | with little expenditure of money | - |
| incontestable | 17 | incapable of being contested or disputed | - |
| indescribably | 23 | to an inexpressible degree | she was looking very young tonight, and, as usual, indescribably beautiful, in a simple strapless dress of a green and white silky cotton |
| intransigence | 16 | the trait of being intransigent; stubbornly refusing to compromise | - |
| interbreeding | 17 | reproduction by parents of different races (especially by white and non-white persons) | - |
| industrialize | 23 | develop industry; become industrial | The nations of South East Asia will quickly industrialize and catch up with the West |
| ineffectively | 27 | in an ineffective manner | he dealt with the problem rather ineffectively |
| incandescence | 20 | the phenomenon of light emission by a body as its temperature is raised | - |
| interrogatory | 17 | relating to the use of or having the nature of an interrogation | - |
| intangibility | 19 | the quality of being intangible and not perceptible by touch | - |
| immortalizing | 27 | - | - |
| impassability | 22 | - | - |
| inflorescence | 20 | the time and process of budding and unfolding of blossoms | - |
| ingenuousness | 14 | the quality of innocent naivete | - |
| insatiability | 18 | - | - |
| inopportunely | 20 | at an inconvenient time | he arrived inopportunely just as we sat down for dinner |
| incontestably | 20 | - | - |
| inconsecutive | 20 | - | - |
| intracerebral | 17 | within the brain | - |
| interpolation | 15 | the action of interjecting or interposing an action or remark that interrupts | - |
| interchanging | 20 | - | - |
| instinctually | 18 | - | - |
| intermarrying | 19 | - | - |
| internalizing | 23 | - | - |
| intraversable | 18 | - | - |
| intransitives | 16 | - | - |
| interblending | 17 | - | - |
| intercostally | 18 | - | - |
| intercultures | 15 | - | - |
| intercurrents | 15 | - | - |
| intermuscular | 17 | - | - |
| interoception | 17 | sensitivity to stimuli originating inside of the body | - |
| interpluvials | 18 | - | - |
| intersegments | 16 | - | - |
| instagramming | 19 | - | - |
| inshrinements | 18 | - | - |
| incrassatives | 18 | - | - |
| incumbrancers | 21 | - | - |
| indiscreetest | 16 | - | - |
| inelaborating | 16 | - | - |
| informatising | 19 | - | - |
| informatizing | 28 | - | - |
| intravenouses | 16 | - | - |
| immersiveness | 20 | - | - |
| interservices | 18 | - | - |
| interorbitals | 15 | - | - |
| interoperates | 15 | - | - |
| interoperated | 16 | - | - |
| interhospital | 18 | - | - |
| intercoupling | 18 | - | - |
| intercounties | 15 | - | - |
| interclusters | 15 | - | - |
| interchannels | 18 | - | - |
| intercalaries | 15 | - | - |
| interbranches | 20 | - | - |
| interboroughs | 19 | - | - |
| interagencies | 16 | - | - |
| interstations | 13 | - | - |
| incarnational | 15 | - | - |
| immortalising | 18 | - | - |
| immunogeneses | 18 | - | - |
| immunogenesis | 18 | - | - |
| immunogenetic | 20 | - | - |
| immunological | 20 | of or relating to immunology | - |
| immunologists | 18 | - | - |
| immunosorbent | 19 | - | - |
| immunotherapy | 25 | therapy designed to produce immunity to a disease or to enhance resistance by the immune system | - |
| immutableness | 19 | the quality of being incapable of mutation | - |
| immunocomplex | 30 | - | - |
| immunochemist | 24 | - | - |
| immortalities | 17 | - | - |
| immortalizers | 26 | - | - |
| immovableness | 22 | not capable of being moved or rearranged | - |
| immoveability | 25 | - | - |
| immunifacient | 22 | - | - |
| immunisations | 17 | - | - |
| immunizations | 26 | - | - |
| impalpability | 24 | the quality of being intangible and not perceptible by touch | - |
| imparipinnate | 19 | (a leaf shape) pinnate with a single leaflet at the apex | - |
| impartialness | 17 | - | - |
| impenetrating | 18 | - | - |
| impenetration | 17 | - | - |
| impenitencies | 19 | - | - |
| imperatorship | 22 | - | - |
| imperceivable | 24 | - | - |
| imperceptions | 21 | - | - |
| impedimentary | 23 | - | - |
| impecuniously | 22 | - | - |
| impartibility | 22 | - | - |
| impassibility | 22 | - | - |
| impassionedly | 21 | - | - |
| impassiveness | 20 | apathy demonstrated by an absence of emotional reactions | - |
| impassivities | 20 | - | - |
| impeccability | 26 | the quality of being without an error or fault | - |
| impecuniosity | 22 | - | - |
| impercipience | 23 | - | - |
| immortalisers | 17 | - | - |
| illegitimated | 17 | - | - |
| illocutionary | 18 | - | - |
| illogicalness | 16 | invalid or incorrect reasoning | - |
| illusionistic | 15 | - | - |
| illustratable | 15 | - | - |
| illustrations | 13 | - | - |
| illustriously | 16 | in an illustrious manner | Einstein, the illustriously famous physicist of the 20th century |
| illustrissimo | 15 | - | - |
| illiquidities | 23 | - | - |
| illimitations | 15 | - | - |
| illegitimates | 16 | - | - |
| illiberalised | 16 | - | - |
| illiberalises | 15 | - | - |
| illiberalisms | 17 | - | - |
| illiberalized | 25 | - | - |
| illiberalizes | 24 | - | - |
| illiberalness | 15 | - | - |
| illicitnesses | 15 | - | - |
| imaginariness | 16 | - | - |
| imaginational | 16 | - | - |
| imaginatively | 22 | with imagination | the room was decorated very imaginatively |
| immaterialize | 26 | render immaterial or incorporeal | - |
| immediateness | 18 | lack of an intervening or mediating agency | - |
| immensenesses | 17 | - | - |
| immersionisms | 19 | - | - |
| immersionists | 17 | - | - |
| immigrational | 18 | - | - |
| immiscibility | 24 | - | - |
| immiserations | 17 | - | - |
| immateriality | 20 | the quality of not being physical; not consisting of matter | - |
| immaterialist | 17 | - | - |
| imagistically | 21 | - | - |
| imbecilically | 24 | - | - |
| imitabilities | 17 | - | - |
| imitativeness | 18 | - | - |
| immanentistic | 19 | - | - |
| immarcescible | 23 | - | - |
| immaterialise | 17 | render immaterial or incorporeal | - |
| immaterialism | 19 | - | - |
| immoderations | 18 | - | - |
| importunities | 17 | - | - |
| impracticably | 26 | to an impracticable degree | this is still impracticably high |
| impractically | 24 | - | - |
| impreciseness | 19 | the quality of lacking precision | - |
| impredicative | 23 | - | - |
| impregnatable | 20 | - | - |
| impregnations | 18 | - | - |
| impracticable | 23 | not capable of being carried out or put into practice | refloating the sunken ship proved impracticable because of its fragility |
| impoverishing | 24 | - | - |
| impossibilism | 21 | - | - |
| impossibilist | 19 | - | - |
| imposthumated | 23 | - | - |
| imposthumates | 22 | - | - |
| impostumating | 20 | - | - |
| impostumation | 19 | - | - |
| impoverishers | 23 | - | - |
| imprisonments | 19 | - | - |
| improbability | 24 | the quality of being improbable | impossibility should never be confused with improbability |
| impropriating | 20 | - | - |
| improvisators | 20 | - | - |
| improvisatory | 23 | - | - |
| improvisatrix | 27 | - | - |
| impulsivities | 20 | - | - |
| imputableness | 19 | - | - |
| inabstinences | 17 | - | - |
| inactivations | 18 | - | - |
| improvisatori | 20 | - | - |
| improvisatore | 20 | - | - |
| impropriation | 19 | - | - |
| impropriators | 19 | - | - |
| improprieties | 19 | - | - |
| improvability | 25 | - | - |
| improvidences | 23 | - | - |
| improvidently | 24 | in an improvident manner | he lived improvidently for the moment |
| improvisating | 21 | - | - |
| inadaptations | 16 | - | - |
| importunately | 20 | in a beseeching manner | - |
| imperfectible | 24 | capable of being made imperfect | - |
| impermanences | 21 | - | - |
| impermanently | 22 | - | - |
| impermissible | 21 | not allowable | - |
| impermissibly | 24 | not permissibly | the radon level in the basement was impermissibly high |
| imperseverant | 20 | - | - |
| impersonalise | 17 | - | - |
| impersonality | 20 | - | - |
| impersonalize | 26 | - | - |
| imperishables | 22 | - | - |
| imperiousness | 17 | the trait of being imperious and overbearing | - |
| imperfections | 22 | - | - |
| imperfectives | 25 | - | - |
| imperfectness | 22 | the state or an instance of being imperfect | - |
| imperforation | 20 | - | - |
| imperialising | 18 | - | - |
| imperialities | 17 | - | - |
| imperializing | 27 | - | - |
| impersonators | 17 | - | - |
| implacability | 24 | - | - |
| implantations | 17 | - | - |
| implicational | 19 | relating to or concerned with logical implication | implicational language universals |
| implicatively | 25 | - | - |
| impolitically | 22 | - | - |
| impoliticness | 19 | - | - |
| imponderables | 20 | - | - |
| importability | 22 | - | - |
| impiousnesses | 17 | - | - |
| impignoration | 18 | - | - |
| impertinences | 19 | - | - |
| impertinently | 20 | in an impudent or impertinent manner | - |
| imperturbable | 21 | not easily perturbed or excited or upset; marked by extreme calm and composure | hitherto imperturbable, he now showed signs of alarm |
| imperturbably | 24 | - | - |
| impeticossing | 20 | - | - |
| impetuosities | 17 | - | - |
| impetuousness | 17 | rash impulsiveness | - |
| impignorating | 19 | - | - |
| importunacies | 19 | - | - |
| illegibleness | 16 | - | - |
| ichthyofaunal | 27 | - | - |
| ichthyofaunas | 27 | - | - |
| ichthyologies | 25 | - | - |
| ichthyopsidan | 27 | - | - |
| ichthyornises | 24 | - | - |
| ichthyosaurus | 24 | ichthyosaurs of the Jurassic | - |
| iconographers | 21 | - | - |
| ichthyofaunae | 27 | - | - |
| ichthyocollas | 26 | - | - |
| iambographers | 23 | - | - |
| iatrochemical | 22 | - | - |
| iatrochemists | 20 | - | - |
| iatrogenicity | 19 | - | - |
| ichnographies | 24 | - | - |
| iconographies | 21 | - | - |
| iconomachists | 22 | - | - |
| iconomaticism | 21 | - | - |
| idiomaticness | 18 | - | - |
| idiomorphisms | 23 | - | - |
| idioplasmatic | 20 | - | - |
| idiorrhythmic | 27 | - | - |
| idioticalness | 16 | - | - |
| ignoblenesses | 16 | - | - |
| ignominiously | 19 | in a dishonorable manner or to a dishonorable degree | - |
| idiomatically | 21 | in an idiomatic manner | he expressed himself idiomatically |
| iconophilisms | 22 | - | - |
| iconophilists | 20 | - | - |
| idealisations | 14 | - | - |
| idealizations | 23 | - | - |
| idempotencies | 20 | - | - |
| identicalness | 16 | exact sameness | - |
| ideogrammatic | 21 | - | - |
| ideographical | 22 | - | - |
| illaqueations | 22 | - | - |
| infeasibility | 21 | the quality of not being doable | - |
| infinitivally | 22 | - | - |
| inflammations | 20 | - | - |
| inflationisms | 18 | - | - |
| inflationists | 16 | - | - |
| inflectedness | 19 | - | - |
| inflexionally | 26 | - | - |
| inflexionless | 23 | - | - |
| infiltrations | 16 | - | - |
| infectiveness | 21 | - | - |
| infectivities | 21 | - | - |
| infecundities | 19 | - | - |
| inferentially | 19 | - | - |
| inferiorities | 16 | - | - |
| infernalities | 16 | - | - |
| infertilities | 16 | - | - |
| infibulations | 18 | - | - |
| influenceable | 20 | - | - |
| influentially | 19 | exerting influence | - |
| infructuously | 21 | - | - |
| infundibulate | 19 | - | - |
| infuriatingly | 20 | - | - |
| infusibleness | 18 | - | - |
| ingeminations | 16 | - | - |
| ingenerations | 14 | - | - |
| ingeniousness | 14 | the property of being ingenious | - |
| infringements | 19 | - | - |
| infrequencies | 27 | - | - |
| informalities | 18 | - | - |
| informatician | 20 | - | - |
| informatively | 24 | in an informative manner | - |
| informatorily | 21 | - | - |
| infotainments | 18 | - | - |
| infraposition | 18 | - | - |
| infraspecific | 25 | - | - |
| ingraftations | 17 | - | - |
| infantilizing | 26 | - | - |
| industrialise | 14 | develop industry; become industrial | - |
| inefficiently | 24 | in an inefficient manner | he dealt inefficiently with the crisis |
| inegalitarian | 14 | - | - |
| inelaborately | 18 | - | - |
| inelastically | 18 | - | - |
| ineligibility | 19 | the quality or state of being ineligible | - |
| ineludibility | 19 | - | - |
| inerrableness | 15 | - | - |
| inescutcheons | 20 | - | - |
| inefficacious | 23 | lacking the power to produce a desired effect | laws that are inefficacious in stopping crime |
| ineffectually | 24 | in an ineffectual manner | she tried ineffectually to light the primus, and Thomas came to help her |
| industrialism | 16 | an economic system built on large industries rather than on agriculture or craftsmanship | - |
| industriously | 17 | in an industrious manner | they hoed up weeds industriously all morning |
| inedibilities | 16 | - | - |
| ineducability | 21 | - | - |
| ineffableness | 21 | - | - |
| inexactitudes | 23 | - | - |
| inexactnesses | 22 | - | - |
| inexplainable | 24 | - | - |
| inexplainably | 27 | - | - |
| inexpressible | 24 | defying expression | - |
| inexpressibly | 27 | to an inexpressible degree | - |
| infallibilism | 20 | - | - |
| infallibilist | 18 | - | - |
| infantilising | 17 | - | - |
| inexperiences | 24 | - | - |
| inexhaustibly | 28 | with indefatigable energy | - |
| inexistencies | 22 | - | - |
| inexorability | 25 | mercilessness characterized by an unwillingness to relent or let up | - |
| inexpectation | 24 | - | - |
| inexpediences | 25 | - | - |
| inexpediently | 26 | in an inexpedient manner | - |
| infantilities | 16 | - | - |
| inquisitional | 22 | - | - |
| insectivorous | 18 | (of animals and plants) feeding on insects | - |
| insectologies | 16 | - | - |
| insectologist | 16 | - | - |
| inseminations | 15 | - | - |
| insensateness | 13 | - | - |
| insensibility | 18 | devoid of passion or feeling; hardheartedness | - |
| insensitively | 19 | in an insensitive manner | the police officer questioned the woman rather insensitively about the attack |
| insculpturing | 18 | - | - |
| inscriptively | 23 | by means of an inscription | - |
| inquisitively | 28 | with curiosity | - |
| insalivations | 16 | - | - |
| insalubrities | 15 | - | - |
| insanitations | 13 | - | - |
| insatiateness | 13 | - | - |
| inscriptional | 17 | - | - |
| insentiencies | 15 | - | - |
| insidiousness | 14 | subtle and cumulative harmfulness (especially of a disease) | - |
| insomnolences | 17 | - | - |
| inspectorates | 17 | - | - |
| inspectorship | 22 | the office of inspector | - |
| inspiritingly | 19 | - | - |
| inspiritments | 17 | - | - |
| inspissations | 15 | - | - |
| instabilities | 15 | - | - |
| insolvability | 21 | - | - |
| insolubleness | 15 | - | - |
| insincerities | 15 | - | - |
| insinuatingly | 17 | - | - |
| insipidnesses | 16 | - | - |
| insociability | 20 | - | - |
| insolubilised | 16 | - | - |
| insolubilises | 15 | - | - |
| insolubilized | 25 | - | - |
| insolubilizes | 24 | - | - |
| installations | 13 | - | - |
| inquilinities | 22 | - | - |
| ingrainedness | 15 | - | - |
| inheritresses | 16 | - | - |
| inhomogeneity | 22 | the quality of being inhomogeneous | - |
| inhomogeneous | 19 | not homogeneous | - |
| inhospitality | 21 | unkind and inconsiderate welcome | he was taken aback by such inhospitality |
| inhumannesses | 18 | - | - |
| inimicalities | 17 | - | - |
| inimitability | 20 | - | - |
| initialnesses | 13 | - | - |
| inharmonicity | 23 | - | - |
| inhalatoriums | 18 | - | - |
| ingratiations | 14 | - | - |
| ingravescence | 21 | - | - |
| ingrownnesses | 17 | - | - |
| ingurgitating | 16 | - | - |
| ingurgitation | 15 | - | - |
| inhabitancies | 20 | - | - |
| inhabitations | 18 | - | - |
| inhabitresses | 18 | - | - |
| initiatresses | 13 | - | - |
| injudiciously | 26 | in an injudicious manner | these intelligence tests were used injudiciously for many years |
| injuriousness | 20 | destructiveness that causes harm or injury | - |
| inoffensively | 25 | in a not unpleasantly offensive manner | that wretched beast, the elephant, breathing inoffensively not a pace behind me |
| inofficiously | 24 | - | - |
| inoperability | 20 | - | - |
| inoperculates | 17 | - | - |
| inopportunity | 20 | - | - |
| inordinations | 14 | - | - |
| inorganically | 19 | not involving carbon compounds | inorganically bound molecules |
| inodorousness | 14 | - | - |
| inoculability | 20 | - | - |
| innocuousness | 15 | - | - |
| innovationist | 16 | - | - |
| innoxiousness | 20 | - | - |
| inobservances | 20 | - | - |
| inobservantly | 21 | - | - |
| inobservation | 18 | - | - |
| inobtrusively | 21 | - | - |
| inoccupations | 19 | - | - |
| inosculations | 15 | - | - |
| induplication | 18 | - | - |
| incogitancies | 18 | - | - |
| incompetently | 22 | in an incompetent manner | he did the job rather incompetently |
| incompletions | 19 | - | - |
| incompliances | 21 | - | - |
| incompliantly | 22 | - | - |
| incompossible | 21 | - | - |
| inconceivably | 25 | to an inconceivable degree | inconceivably small |
| inconclusions | 17 | - | - |
| incompetences | 21 | - | - |
| incompatibles | 21 | - | - |
| incognisances | 18 | - | - |
| incognizances | 27 | - | - |
| incoherencies | 20 | - | - |
| incombustible | 21 | not capable of igniting and burning | - |
| incombustibly | 24 | - | - |
| incommiscible | 23 | - | - |
| incommodities | 20 | - | - |
| incondensable | 18 | - | - |
