10-letter words starting with IN
Embark on a linguistic journey with words that begin with the letter IN. This section showcases how IN 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 IN, enriching your vocabulary and appreciation for language.
| Word | Points | Definition | Sentence example |
|---|---|---|---|
| interested | 11 | involved in or affected by or having a claim to or share in | the interested parties met to discuss the business |
| incredible | 15 | beyond belief or understanding | at incredible speed |
| indistinct | 13 | not clearly defined or easy to perceive or understand | indistinct shapes in the gloom |
| individual | 15 | characteristic of or meant for a single person or thing | an individual serving |
| invitation | 13 | a request (spoken or written) to participate or be present or take part in something | an invitation to lunch |
| incredibly | 18 | not easy to believe | incredibly, she survived the crash |
| introduced | 14 | - | - |
| investment | 15 | money that is invested with an expectation of profit | - |
| instrument | 12 | write an instrumental score for | - |
| industrial | 11 | employed in industry | the industrial classes |
| inevitable | 15 | an unavoidable event | don't argue with the inevitable |
| inspection | 14 | a formal or official examination | we had to wait for the inspection before we could use the elevator |
| instructor | 12 | a person whose occupation is teaching | - |
| increasing | 13 | becoming greater or larger | increasing prices |
| initiative | 13 | serving to set in motion | the initiative phase in the negotiations |
| invincible | 17 | incapable of being overcome or subdued | an invincible army |
| incomplete | 16 | not yet finished | his thesis is still incomplete |
| influenced | 16 | - | - |
| indication | 13 | something that serves to indicate or suggest | an indication of foul play |
| intriguing | 12 | disturbingly provocative | an intriguing smile |
| indigenous | 12 | originating where it is found | the Ainu are indigenous to the northernmost islands of Japan |
| ingredient | 12 | food that is a component of a mixture in cooking | - |
| infiltrate | 13 | enter a group or organization in order to spy on the members | The student organization was infiltrated by a traitor |
| initiation | 10 | wisdom as evidenced by the possession of knowledge | his dullness was due to lack of initiation |
| intimidate | 13 | make timid or fearful | Her boss intimidates her |
| infectious | 15 | caused by infection or capable of causing infection | - |
| inevitably | 18 | by necessity | - |
| internship | 15 | the position of a medical intern | - |
| indicating | 14 | - | - |
| innovative | 16 | being or producing something like nothing done or experienced or created before | stylistically innovative works |
| invaluable | 15 | having incalculable monetary, intellectual, or spiritual worth | - |
| indictment | 15 | a formal document written for a prosecuting attorney charging a person with some offense | - |
| integrated | 12 | formed or united into a whole | - |
| inadequate | 20 | of insufficient quantity to meet a need | an inadequate income |
| infidelity | 17 | the quality of being unfaithful | - |
| insecurity | 15 | the anxiety you experience when you feel vulnerable and insecure | - |
| insatiable | 12 | impossible to satisfy | an insatiable demand for old buildings to restore |
| interstate | 10 | one of the system of highways linking major cities in the 48 contiguous states of the United States | - |
| indulgence | 14 | an inability to resist the gratification of whims and desires | - |
| innovation | 13 | a creation (a new device or process) resulting from study and experimentation | - |
| interfered | 14 | - | - |
| infinitely | 16 | continuing forever without end | there are infinitely many possibilities |
| internally | 13 | on or from the inside | an internally controlled environment |
| intervened | 14 | - | - |
| initiating | 11 | - | - |
| insulation | 10 | insulating material that reduces or prevents the transmission of heat or sound or electricity | - |
| intimately | 15 | in a close manner | the two phenomena are intimately connected |
| intolerant | 10 | narrow-minded about cherished opinions | - |
| indirectly | 16 | not in a forthright manner | he answered very indirectly |
| inherently | 16 | in an inherent manner | the subject matter is sexual activity of any overt kind, which is depicted as inherently desirable and exciting |
| indisposed | 14 | somewhat ill or prone to illness | feeling a bit indisposed today |
| installing | 11 | the act of installing something (as equipment) | - |
| inquisitor | 19 | a questioner who is excessively harsh | - |
| indiscreet | 13 | lacking discretion; injudicious | her behavior was indiscreet at the very best |
| infatuated | 14 | marked by foolish or unreasoning fondness | he was infatuated with her |
| inaccurate | 14 | not accurate | an inaccurate translation |
| inflatable | 15 | designed to be filled with air or gas | an inflatable mattress |
| instalment | 12 | a part of a broadcast serial | - |
| incendiary | 16 | a criminal who illegally sets fire to property | - |
| indecisive | 16 | characterized by lack of decision and firmness | an indecisive manager brought the enterprise to a standstill |
| inoperable | 14 | not able to perform its normal function | - |
| infallible | 15 | incapable of failure or error | an infallible antidote |
| intangible | 13 | incapable of being perceived by the senses especially the sense of touch | the intangible constituent of energy |
| insightful | 17 | exhibiting insight or clear and deep perception | an insightful parent |
| instigated | 12 | - | - |
| incestuous | 12 | resembling incest as by excessive intimacy | - |
| instituted | 11 | - | - |
| innocently | 15 | in a not unlawful manner | he claimed to have purchased the contraband innocently |
| invariably | 18 | without variation or change, in every case | - |
| indicative | 16 | (usually followed by `of') pointing out or revealing clearly | actions indicative of fear |
| injunction | 19 | (law) a judicial remedy issued in order to prohibit a party from doing or continuing to do a certain activity | injunction were formerly obtained by writ but now by a judicial order |
| inaugurate | 11 | commence officially | - |
| insistence | 12 | continual and persistent demands | - |
| internment | 12 | the act of confining someone in a prison (or as if in a prison) | - |
| infraction | 15 | a crime less serious than a felony | - |
| informally | 18 | with the use of colloquial expressions | - |
| infuriated | 14 | marked by extreme anger | infuriated onlookers charged the police who were beating the boy |
| intestinal | 10 | of or relating to or inside the intestines | intestinal disease |
| incoherent | 15 | unable to express yourself clearly or fluently | incoherent with grief |
| insurgency | 16 | an organized rebellion aimed at overthrowing a constituted government through the use of subversion and armed conflict | - |
| inflexible | 22 | incapable of adapting or changing to meet circumstances | an inflexible law |
| inheriting | 14 | having the legal right to inherit | - |
| indefinite | 14 | not decided or not known | were indefinite about their plans |
| inhalation | 13 | the act of inhaling; the drawing in of air (or other gases) as in breathing | - |
| incidental | 13 | not of prime or central importance | - |
| inebriated | 13 | stupefied or excited by a chemical substance (especially alcohol) | helplessly inebriated |
| inequality | 22 | lack of equality | the growing inequality between rich and poor |
| institutes | 10 | - | - |
| inadequacy | 25 | lack of an adequate quantity or number | the inadequacy of unemployment benefits |
| incinerate | 12 | cause to undergo combustion | - |
| incubation | 14 | sitting on eggs so as to hatch them by the warmth of the body | - |
| inhabitant | 15 | a person who inhabits a particular place | - |
| indecision | 13 | the trait of irresolution; a lack of firmness of character or purpose | - |
| inhibition | 15 | (psychology) the conscious exclusion of unacceptable thoughts or desires | - |
| inhumanity | 18 | the quality of lacking compassion or consideration for others | - |
| intonation | 10 | rise and fall of the voice pitch | - |
| inexorably | 22 | in an inexorable manner | time marches on inexorably |
| incapacity | 19 | lack of intellectual power | - |
| infarction | 15 | localized necrosis resulting from obstruction of the blood supply | - |
| inimitable | 14 | defying imitation; matchless | an inimitable style |
| intertwine | 13 | spin, wind, or twist together | intertwine the ribbons |
| inbreeding | 14 | the act of mating closely related individuals | - |
| inoculated | 13 | - | - |
| instigator | 11 | someone who deliberately foments trouble | she was the instigator of their quarrel |
| inexorable | 19 | impervious to pleas, persuasion, requests, reason | Cynthia was inexorable; she would have none of him |
| inordinate | 11 | beyond normal limits | a book of inordinate length |
| insinuated | 11 | - | - |
| insolvency | 18 | the lack of financial resources | - |
| intubation | 12 | the insertion of a cannula or tube into a hollow body organ | - |
| interwoven | 16 | linked or locked closely together as by dovetailing | - |
| invalidate | 14 | declare invalid | - |
| indecently | 16 | in an indecent manner | she was rather indecently dressed |
| indentured | 12 | bound by contract | - |
| intimation | 12 | a slight suggestion or vague understanding | - |
| invocation | 15 | a prayer asking God's help as part of a religious service | - |
| inactivity | 18 | a disposition to remain inactive or inert | - |
| infliction | 15 | something or someone that causes trouble; a source of unhappiness | he's not a friend, he's an infliction |
| ingratiate | 11 | gain favor with somebody by deliberate efforts | - |
| intoxicate | 19 | make drunk (with alcoholic drinks) | - |
| incarnated | 13 | - | - |
| indelicate | 13 | lacking propriety and good taste in manners and conduct | - |
| ineligible | 13 | not eligible | ineligible to vote |
| infinitive | 16 | the uninflected form of the verb | - |
| iniquitous | 19 | characterized by iniquity; wicked because it is believed to be a sin | iniquitous deeds |
| inseminate | 12 | place seeds in or on (the ground) | - |
| insensible | 12 | barely able to be perceived | an almost insensible change |
| inveterate | 13 | in a habitual and longstanding manner | - |
| incitement | 14 | an act of urging on or spurring on or rousing to action or instigating | the incitement of mutiny |
| inconstant | 12 | likely to change frequently often without apparent or cogent reason; variable | inconstant affections |
| infrasound | 14 | - | - |
| inviolable | 15 | immune to attack; incapable of being tampered with | fortifications that made the frontier inviolable |
| inflection | 15 | a manner of speaking in which the loudness or pitch or tone of the voice is modified | - |
| infrequent | 22 | not frequent; not occurring regularly or at short intervals | infrequent outbursts of temper |
| insulating | 11 | - | - |
| interfaith | 16 | involving persons of different religious faiths | an interfaith marriage |
| invigorate | 14 | impart vigor, strength, or vitality to | - |
| indecorous | 13 | not in keeping with accepted standards of what is right or proper in polite society | indecorous behavior |
| ineptitude | 13 | unskillfulness resulting from a lack of training | - |
| interceded | 14 | - | - |
| interfaced | 16 | - | - |
| intimating | 13 | - | - |
| incubating | 15 | - | - |
| interferon | 13 | an antiviral protein produced by cells that have been invaded by a virus; inhibits replication of the virus | - |
| interloper | 12 | someone who intrudes on the privacy or property of another without permission | - |
| interposed | 13 | - | - |
| indictable | 15 | liable to be accused, or cause for such liability | an indictable offense |
| indiscrete | 13 | not divided or divisible into parts | layers that were fused into an indiscrete mass |
| inducement | 15 | a positive motivational influence | - |
| inexistent | 17 | - | - |
| infighting | 18 | - | - |
| initialize | 19 | assign an initial value to a computer program | - |
| injunctive | 22 | - | - |
| innovating | 14 | - | - |
| instilling | 11 | teaching or impressing upon the mind by frequent instruction or repetition | - |
| interlaced | 13 | having a pattern of fretwork or latticework | - |
| incumbency | 21 | the term during which some position is held | - |
| infamously | 18 | - | - |
| inhibitory | 18 | restrictive of action | an overly strict and inhibitory discipline |
| insolently | 13 | in an insolent manner | he had replied insolently to his superiors |
| intoxicant | 19 | a liquor or brew containing alcohol as the active agent | - |
| inundation | 11 | an overwhelming number or amount | - |
| incautious | 12 | carelessly failing to exercise proper caution | an incautious step sent her headlong down the stairs |
| incivility | 18 | deliberate discourtesy | - |
| inculcated | 15 | - | - |
| insurgence | 13 | an organized rebellion aimed at overthrowing a constituted government through the use of subversion and armed conflict | - |
| interbreed | 13 | breed animals or plants using parents of different races and varieties | these species do not interbreed |
| interspace | 14 | - | - |
| intramural | 12 | carried on within the bounds of an institution or community | most of the students participated actively in the college's intramural sports program |
| invalidity | 17 | illogicality as a consequence of having a conclusion that does not follow from the premisses | - |
| invitingly | 17 | in a tantalizing manner | - |
| inaccuracy | 19 | the quality of being inaccurate and having errors | - |
| inarguably | 16 | in an unarguable and undisputed manner | you write as if this fact whilst inarguably forever condemning me to the ranks of Bohemianism nevertheless earned for me the right of entry into any company |
| indelicacy | 18 | an impolite act or expression | - |
| indulgency | 17 | - | - |
| influencer | 15 | - | - |
| infringing | 15 | - | - |
| inglorious | 11 | (used of conduct or character) deserving or bringing disgrace or shame | inglorious defeat |
| initialled | 11 | - | - |
| innumerous | 12 | too numerous to be counted | - |
| insensibly | 15 | in a numb manner; without feeling | - |
| intermarry | 15 | marry within the same ethnic, social, or family group | - |
| intermural | 12 | between two or more institutions etc | an intermural track meet |
| interphone | 15 | a telephonic intercommunication system linking different rooms in a building or ship etc | - |
| introspect | 14 | reflect on one's own thoughts and feelings | - |
| invariable | 15 | a quantity that does not vary | - |
| inactivate | 15 | release from military service or remove from the active list of military service | - |
| inactively | 18 | - | - |
| inadaptive | 16 | - | - |
| inamoratas | 12 | - | - |
| inamoratos | 12 | - | - |
| inanitions | 10 | - | - |
| inapparent | 14 | - | - |
| inappetent | 14 | - | - |
| inapposite | 14 | of an inappropriate or misapplied nature | - |
| inaptitude | 13 | a lack of aptitude | - |
| inarguable | 13 | against which no argument can be made | - |
| inartistic | 12 | lacking aesthetic sensibility | - |
| inaugurals | 11 | - | - |
| inaurating | 11 | - | - |
| inbounding | 14 | - | - |
| inbreathed | 16 | - | - |
| inbreathes | 15 | - | - |
| inbreeders | 13 | - | - |
| inbringing | 14 | - | - |
| inbursting | 13 | - | - |
| incandesce | 15 | become incandescent or glow with heat | - |
| incantator | 12 | - | - |
| incapables | 16 | - | - |
| incarnates | 12 | - | - |
| incasement | 14 | the act of enclosing something in a case | - |
| incatenate | 12 | - | - |
| incautions | 12 | - | - |
| incedingly | 17 | - | - |
| incentives | 15 | - | - |
| inceptions | 14 | - | - |
| inceptives | 17 | - | - |
| incessancy | 17 | the quality of something that continues without end or interruption | - |
| inchoately | 18 | - | - |
| inchoating | 16 | - | - |
| inchoation | 15 | - | - |
| inchoative | 18 | aspect with regard to the beginning of the action of the verb | - |
| incidences | 15 | - | - |
| incipience | 16 | beginning to exist or to be apparent | he placed the incipience of democratic faith at around 1850 |
| incipiency | 19 | beginning to exist or to be apparent | it is designed to arrest monopolies in their incipiency |
| incisiform | 17 | - | - |
| incisively | 18 | in a precise manner | - |
| incisorial | 12 | - | - |
| incitation | 12 | an act of urging on or spurring on or rousing to action or instigating | - |
| incitative | 15 | - | - |
| incitingly | 16 | - | - |
| inclasping | 15 | - | - |
| inclemency | 19 | weather unsuitable for outdoor activities | - |
| inclinable | 14 | - | - |
| inclinings | 13 | - | - |
| inclipping | 17 | - | - |
| inclosable | 14 | - | - |
| inclosures | 12 | - | - |
| includable | 15 | - | - |
| includible | 15 | - | - |
| inclusions | 12 | - | - |
| incogitant | 13 | - | - |
| incognitas | 13 | - | - |
| incognitos | 13 | - | - |
| incohesive | 18 | - | - |
| incommoded | 18 | - | - |
| incommodes | 17 | - | - |
| incompared | 17 | - | - |
| incomposed | 17 | - | - |
| incoronate | 12 | - | - |
| incorporal | 14 | - | - |
| incorpsing | 15 | - | - |
| incrassate | 12 | - | - |
| increasers | 12 | - | - |
| increately | 15 | - | - |
| incremated | 15 | - | - |
| incremates | 14 | - | - |
| increments | 14 | - | - |
| increscent | 14 | - | - |
| incretions | 12 | - | - |
| incrossing | 13 | - | - |
| incrustant | 12 | - | - |
| incrusting | 13 | - | - |
| incubative | 17 | - | - |
| incubators | 14 | - | - |
| incubatory | 17 | - | - |
| inculcates | 14 | - | - |
| inculcator | 14 | - | - |
| inculpable | 16 | free of guilt; not subject to blame | - |
| inculpably | 19 | - | - |
| inculpated | 15 | - | - |
| inculpates | 14 | - | - |
| incumbents | 16 | - | - |
| incumbered | 17 | - | - |
| incunables | 14 | - | - |
| incunabula | 14 | - | - |
| incurables | 14 | - | - |
| incurrable | 14 | - | - |
| incurrence | 14 | the act of incurring (making yourself subject to something undesirable) | - |
| incursions | 12 | - | - |
| incurvated | 16 | - | - |
| incurvates | 15 | - | - |
| indagating | 13 | - | - |
| indagation | 12 | - | - |
| indagative | 15 | - | - |
| indagators | 12 | - | - |
| indagatory | 15 | - | - |
| indapamide | 16 | diuretic (trade name Lozal) used in the treatment of hypertension | - |
| indecenter | 13 | - | - |
| indecorums | 15 | - | - |
| indentions | 11 | - | - |
| indentures | 11 | - | - |
| indexation | 18 | a system of economic regulation: wages and interest are tied to the cost-of-living index in order to reduce the effects of inflation | - |
| indexicals | 20 | - | - |
| indextrous | 18 | - | - |
| indicators | 13 | - | - |
| indicatory | 16 | (usually followed by `of') pointing out or revealing clearly | - |
| indicolite | 13 | - | - |
| indictably | 18 | - | - |
| indictions | 13 | - | - |
| indigences | 14 | - | - |
| indigenise | 12 | - | - |
| indigenity | 15 | - | - |
| indigenize | 21 | - | - |
| indigently | 15 | - | - |
| indigested | 13 | - | - |
| indignance | 14 | - | - |
| indigolite | 12 | - | - |
| indigotins | 12 | - | - |
| indinavirs | 14 | - | - |
| indirubins | 13 | - | - |
| indisposes | 13 | - | - |
| inditement | 13 | - | - |
| individuum | 17 | - | - |
| indocility | 16 | - | - |
| indolences | 13 | - | - |
| indolently | 14 | in an indolent manner | he lives indolently with his relatives |
| indophenol | 16 | - | - |
| indorsable | 13 | - | - |
| indraughts | 15 | - | - |
| indrenched | 17 | - | - |
| indrenches | 16 | - | - |
| inductance | 15 | an electrical device (typically a conducting coil) that introduces inductance into a circuit | - |
| inductions | 13 | - | - |
| indumentum | 15 | a covering of fine hairs (or sometimes scales) as on a leaf or insect | - |
| indurating | 12 | - | - |
| induration | 11 | any pathological hardening or thickening of tissue | - |
| indurative | 14 | - | - |
| industries | 11 | - | - |
| indwellers | 14 | - | - |
| indwelling | 15 | existing or residing as an inner activating spirit or force or principle | an indwelling divinity |
| inearthing | 14 | - | - |
| inebriants | 12 | - | - |
| inebriates | 12 | - | - |
| ineducable | 15 | - | - |
| inefficacy | 23 | a lack of efficacy | - |
| inelegance | 13 | the quality of lacking refinement and good taste | - |
| inelegancy | 16 | - | - |
| ineligibly | 16 | - | - |
| ineloquent | 19 | - | - |
| ineludible | 13 | - | - |
| ineludibly | 16 | - | - |
| inequation | 19 | - | - |
| inequities | 19 | - | - |
| inerasable | 12 | - | - |
| inerasably | 15 | - | - |
| inerasible | 12 | - | - |
| inerasibly | 15 | - | - |
| inertially | 13 | - | - |
| inesculent | 12 | - | - |
| inexistant | 17 | - | - |
| inexpertly | 22 | in a crude and unskilled manner | an inexpertly constructed lean-to |
| inexpiable | 21 | incapable of being atoned for | - |
| inexpiably | 24 | - | - |
| inexplicit | 21 | implied though not directly expressed; inherent in the nature of something | - |
| inextended | 19 | - | - |
| infallibly | 18 | - | - |
| infamising | 16 | - | - |
| infamizing | 25 | - | - |
| infamonise | 15 | - | - |
| infamonize | 24 | - | - |
| infanteers | 13 | - | - |
| infanthood | 17 | - | - |
| infantries | 13 | - | - |
| infatuates | 13 | - | - |
| infeasible | 15 | not capable of being carried out or put into practice | - |
| infectants | 15 | - | - |
| infections | 15 | - | - |
| infeftment | 18 | - | - |
| infelicity | 18 | inappropriate and unpleasing manner or style (especially manner or style of expression) | - |
| infeoffing | 20 | - | - |
| inferences | 15 | - | - |
| inferiorly | 16 | - | - |
| infernally | 16 | extremely | infernally clever |
| inferrable | 15 | - | - |
| inferrible | 15 | - | - |
| infestants | 13 | - | - |
| infibulate | 15 | - | - |
| infielders | 14 | - | - |
| infighters | 17 | - | - |
| infillings | 14 | - | - |
| infinitant | 13 | - | - |
| infinitary | 16 | - | - |
| infinitate | 13 | - | - |
| infinities | 13 | - | - |
| infinitude | 14 | the quality of being infinite; without bound or limit | - |
| infirmarer | 15 | - | - |
| infirmness | 15 | - | - |
| infixation | 20 | - | - |
| inflamable | 17 | - | - |
| inflatedly | 17 | - | - |
| inflations | 13 | - | - |
| inflatuses | 13 | - | - |
| inflecting | 16 | - | - |
| inflective | 18 | - | - |
| inflectors | 15 | - | - |
| inflexibly | 25 | in an inflexible manner | `You will--because you must!,' Madam told her inflexibly |
| inflexions | 20 | - | - |
| inflexures | 20 | - | - |
| inflicters | 15 | - | - |
| inflicting | 16 | - | - |
| inflictive | 18 | - | - |
| inflictors | 15 | - | - |
| inflowings | 17 | - | - |
| influences | 15 | - | - |
| influenzal | 22 | - | - |
| influenzas | 22 | - | - |
| influxions | 20 | - | - |
| infoldings | 15 | - | - |
| infoldment | 16 | - | - |
| infomanias | 15 | - | - |
| informable | 17 | - | - |
| informants | 15 | - | - |
| informedly | 19 | - | - |
| infortunes | 13 | - | - |
| infosphere | 18 | - | - |
| infraclass | 15 | - | - |
| infracting | 16 | - | - |
| infractors | 15 | - | - |
| infragrant | 14 | - | - |
| infrahuman | 18 | belonging to a group below humans in evolutionary development | infrahuman animals |
| infraorder | 14 | - | - |
| infraposed | 16 | - | - |
| infrasonic | 15 | having frequencies below those of audible sound | - |
| infringers | 14 | - | - |
| infuriates | 13 | - | - |
| infuscated | 16 | - | - |
| infusorial | 13 | - | - |
| infusorian | 13 | any member of the subclass Infusoria | - |
| infusories | 13 | - | - |
| ingathered | 15 | - | - |
| ingatherer | 14 | - | - |
| ingeminate | 13 | to say, state, or perform again | - |
| ingenerate | 11 | - | - |
| ingestible | 13 | - | - |
| ingestions | 11 | - | - |
| ingleneuks | 15 | - | - |
| inglenooks | 15 | - | - |
| ingrafting | 15 | - | - |
| ingrainers | 11 | - | - |
| ingraining | 12 | teaching or impressing upon the mind by frequent instruction or repetition | - |
| ingrateful | 14 | - | - |
| ingression | 11 | - | - |
| ingressive | 14 | - | - |
| ingrooving | 15 | - | - |
| ingrossing | 12 | - | - |
| ingrounded | 13 | - | - |
| ingulfment | 16 | - | - |
| ingulphing | 17 | - | - |
| inhabiters | 15 | - | - |
| inhabiting | 16 | - | - |
| inhabitors | 15 | - | - |
| inhalators | 13 | - | - |
| inharmonic | 17 | lacking in harmony | - |
| inhausting | 14 | - | - |
| inhearsing | 14 | - | - |
| inherences | 15 | - | - |
| inheritors | 13 | - | - |
| inheritrix | 20 | a female heir | - |
| inhibiters | 15 | - | - |
| inhibiting | 16 | - | - |
| inhibitive | 18 | - | - |
| inhibitors | 15 | - | - |
| inholdings | 15 | - | - |
| inhumanely | 18 | in an inhumane manner | the prisoners of war were treated inhumanely |
| inhumanest | 15 | - | - |
| inhumating | 16 | - | - |
| inhumation | 15 | the ritual placing of a corpse in a grave | - |
| inimically | 17 | - | - |
| inimitably | 17 | in an unreproducible manner | he has an inimitably verbose style |
| iniquities | 19 | - | - |
| initialers | 10 | - | - |
| initialing | 11 | - | - |
| initialise | 10 | assign an initial value to a computer program | - |
| initialism | 12 | a word formed from the initial letters of the several words in the name and pronounced as one word | `NATO' is an initialism for North Atlantic Treaty Organization |
| initialler | 10 | - | - |
| initiators | 10 | - | - |
| initiatory | 13 | serving to set in motion | an initiatory step toward a treaty |
| initiatrix | 17 | - | - |
| injectable | 21 | (used of drugs) capable of being injected | - |
| injectants | 19 | - | - |
| injections | 19 | - | - |
| injellying | 21 | - | - |
| injointing | 18 | - | - |
| injudicial | 20 | - | - |
| injuncting | 20 | - | - |
| injustices | 19 | - | - |
| inkberries | 16 | - | - |
| inkholders | 18 | - | - |
| inkinesses | 14 | - | - |
| inmarriage | 13 | marriage within one's own tribe or group as required by custom or law | - |
| inmigrants | 13 | - | - |
| innateness | 10 | the quality of being innate | - |
| innermosts | 12 | - | - |
| innersoles | 10 | - | - |
| innervated | 14 | - | - |
| innervates | 13 | - | - |
| innerwears | 13 | - | - |
| innkeepers | 16 | - | - |
| innocences | 14 | - | - |
| innocenter | 12 | - | - |
