13-letter words starting with I

13-letter words starting with I number 949, from familiar “international” to the 34-point scorer “isocarboxazid.”

949 wordsTop pick INTERNATIONALHighest score ISOCARBOXAZID 34

38 of 949 are everyday words (4%). Mostly rare words: great for Scrabble, tough for daily puzzles.

Letter
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z

P starts the most 13-letter words (1,597); Y starts the fewest (10). I ranks #5 of 26. The bar under each letter shows the size of its list.

Length
2
3
4
5
6
7
8
9
10
11
12
13
14
15

Common words 38 · most-used first

INTERNATIONAL₁₃
INVESTIGATION₁₇
INVESTIGATING₁₈
INDEPENDENTLY₂₀
INSTITUTIONAL₁₃
INAPPROPRIATE₁₉
INVESTIGATORS₁₇
ILLUSTRATIONS₁₃
INTENTIONALLY₁₆
INSTALLATIONS₁₃
INSPIRATIONAL₁₅
INTERVENTIONS₁₆
INCONVENIENCE₂₀
INCORPORATING₁₈
INVESTIGATIVE₂₀
IRRESPONSIBLE₁₇
INTERESTINGLY₁₇
INTERROGATION₁₄
INSIGNIFICANT₁₉
INSTRUCTIONAL₁₅
INEXPERIENCED₂₅
INTELLECTUALS₁₅
INADVERTENTLY₂₀
INCORPORATION₁₇
INTERPERSONAL₁₅
INCARCERATION₁₇
INDISPENSABLE₁₈
INTRODUCTIONS₁₆
IMPERFECTIONS₂₂
INTERSECTIONS₁₅
INSTINCTIVELY₂₁
INCONSISTENCY₂₀
INTERCEPTIONS₁₇
INDIVIDUALITY₂₁
INFORMATIONAL₁₈
INSTANTANEOUS₁₃
INTERRUPTIONS₁₅
IMPROVISATION₂₀

All valid words 949

A to Z. Includes rare and Collins-only words. Linked tiles open the word's meaning, score and rhymes.

IAMBOGRAPHERS₂₃
IATROCHEMICAL₂₂
IATROCHEMISTS₂₀
IATROGENICITY₁₉
ICHNOGRAPHIES₂₄
ICHTHYOCOLLAS₂₆
ICHTHYOFAUNAE₂₇
ICHTHYOFAUNAL₂₇
ICHTHYOFAUNAS₂₇
ICHTHYOLOGIES₂₅
ICHTHYOLOGIST₂₅
ICHTHYOPSIDAN₂₇
ICHTHYORNISES₂₄
ICHTHYOSAURUS₂₄
ICONOGRAPHERS₂₁
ICONOGRAPHIES₂₁
ICONOMACHISTS₂₂
ICONOMATICISM₂₁
ICONOPHILISMS₂₂
ICONOPHILISTS₂₀
IDEALISATIONS₁₄
IDEALIZATIONS₂₃
IDEMPOTENCIES₂₀
IDENTICALNESS₁₆
IDEOGRAMMATIC₂₁
IDEOGRAPHICAL₂₂
IDEOLOGICALLY₂₀
IDIOMATICALLY₂₁
IDIOMATICNESS₁₈
IDIOMORPHISMS₂₃
IDIOPLASMATIC₂₀
IDIORRHYTHMIC₂₇
IDIOSYNCRATIC₂₁
IDIOTICALNESS₁₆
IGNOBLENESSES₁₆
IGNOMINIOUSLY₁₉
ILLAQUEATIONS₂₂
ILLEGIBLENESS₁₆
ILLEGITIMATED₁₇
ILLEGITIMATES₁₆
ILLIBERALISED₁₆
ILLIBERALISES₁₅
ILLIBERALISMS₁₇
ILLIBERALIZED₂₅
ILLIBERALIZES₂₄
ILLIBERALNESS₁₅
ILLICITNESSES₁₅
ILLIMITATIONS₁₅
ILLIQUIDITIES₂₃
ILLOCUTIONARY₁₈
ILLOGICALNESS₁₆
ILLUMINATIONS₁₅
ILLUSIONISTIC₁₅
ILLUSTRATABLE₁₅
ILLUSTRATIONS₁₃
ILLUSTRIOUSLY₁₆
ILLUSTRISSIMO₁₅
IMAGINARINESS₁₆
IMAGINATIONAL₁₆
IMAGINATIVELY₂₂
IMAGISTICALLY₂₁
IMBECILICALLY₂₄
IMIDACLOPRIDS₂₁
IMITABILITIES₁₇
IMITATIVENESS₁₈
IMMANENTISTIC₁₉
IMMARCESCIBLE₂₃
IMMATERIALISE₁₇
IMMATERIALISM₁₉
IMMATERIALIST₁₇
IMMATERIALITY₂₀
IMMATERIALIZE₂₆
IMMEDIATENESS₁₈
IMMENSENESSES₁₇
IMMERSIONISMS₁₉
IMMERSIONISTS₁₇
IMMERSIVENESS₂₀
IMMIGRATIONAL₁₈
IMMISCIBILITY₂₄
IMMISERATIONS₁₇
IMMODERATIONS₁₈
IMMORTALISERS₁₇
IMMORTALISING₁₈
IMMORTALITIES₁₇
IMMORTALIZERS₂₆
IMMORTALIZING₂₇
IMMOVABLENESS₂₂
IMMOVEABILITY₂₅
IMMUNIFACIENT₂₂
IMMUNISATIONS₁₇
IMMUNIZATIONS₂₆
IMMUNOCHEMIST₂₄
IMMUNOCOMPLEX₃₀
IMMUNOGENESES₁₈
IMMUNOGENESIS₁₈
IMMUNOGENETIC₂₀
IMMUNOLOGICAL₂₀
IMMUNOLOGISTS₁₈
IMMUNOSORBENT₁₉
IMMUNOTHERAPY₂₅
IMMUTABLENESS₁₉
IMPALPABILITY₂₄
IMPARIPINNATE₁₉
IMPARTIALNESS₁₇
IMPARTIBILITY₂₂
IMPASSABILITY₂₂
IMPASSIBILITY₂₂
IMPASSIONEDLY₂₁
IMPASSIVENESS₂₀
IMPASSIVITIES₂₀
IMPECCABILITY₂₆
IMPECUNIOSITY₂₂
IMPECUNIOUSLY₂₂
IMPEDIMENTARY₂₃
IMPENETRATING₁₈
IMPENETRATION₁₇
IMPENITENCIES₁₉
IMPERATORSHIP₂₂
IMPERCEIVABLE₂₄
IMPERCEPTIBLE₂₃
IMPERCEPTIBLY₂₆
IMPERCEPTIONS₂₁
IMPERCIPIENCE₂₃
IMPERFECTIBLE₂₄
IMPERFECTIONS₂₂
IMPERFECTIVES₂₅
IMPERFECTNESS₂₂
IMPERFORATION₂₀
IMPERIALISING₁₈
IMPERIALISTIC₁₉
IMPERIALITIES₁₇
IMPERIALIZING₂₇
IMPERIOUSNESS₁₇
IMPERISHABLES₂₂
IMPERMANENCES₂₁
IMPERMANENTLY₂₂
IMPERMISSIBLE₂₁
IMPERMISSIBLY₂₄
IMPERSEVERANT₂₀
IMPERSONALISE₁₇
IMPERSONALITY₂₀
IMPERSONALIZE₂₆
IMPERSONATING₁₈
IMPERSONATION₁₇
IMPERSONATORS₁₇
IMPERTINENCES₁₉
IMPERTINENTLY₂₀
IMPERTURBABLE₂₁
IMPERTURBABLY₂₄
IMPETICOSSING₂₀
IMPETUOSITIES₁₇
IMPETUOUSNESS₁₇
IMPIGNORATING₁₉
IMPIGNORATION₁₈
IMPIOUSNESSES₁₇
IMPLACABILITY₂₄
IMPLANTATIONS₁₇
IMPLEMENTABLE₂₁
IMPLICATIONAL₁₉
IMPLICATIVELY₂₅
IMPOLITICALLY₂₂
IMPOLITICNESS₁₉
IMPONDERABLES₂₀
IMPORTABILITY₂₂
IMPORTUNACIES₁₉
IMPORTUNATELY₂₀
IMPORTUNITIES₁₇
IMPOSSIBILISM₂₁
IMPOSSIBILIST₁₉
IMPOSSIBILITY₂₂
IMPOSTHUMATED₂₃
IMPOSTHUMATES₂₂
IMPOSTUMATING₂₀
IMPOSTUMATION₁₉
IMPOVERISHERS₂₃
IMPOVERISHING₂₄
IMPRACTICABLE₂₃
IMPRACTICABLY₂₆
IMPRACTICALLY₂₄
IMPRECISENESS₁₉
IMPREDICATIVE₂₃
IMPREGNATABLE₂₀
IMPREGNATIONS₁₈
IMPRESSIONISM₁₉
IMPRESSIONIST₁₇
IMPRISONMENTS₁₉
IMPROBABILITY₂₄
IMPROPRIATING₂₀
IMPROPRIATION₁₉
IMPROPRIATORS₁₉
IMPROPRIETIES₁₉
IMPROVABILITY₂₅
IMPROVIDENCES₂₃
IMPROVIDENTLY₂₄
IMPROVISATING₂₁
IMPROVISATION₂₀
IMPROVISATORE₂₀
IMPROVISATORI₂₀
IMPROVISATORS₂₀
IMPROVISATORY₂₃
IMPROVISATRIX₂₇
IMPULSIVENESS₂₀
IMPULSIVITIES₂₀
IMPUTABLENESS₁₉
INABSTINENCES₁₇
INACTIVATIONS₁₈
INADAPTATIONS₁₆
INADVERTENCES₁₉
INADVERTENTLY₂₀
INANIMATENESS₁₅
INAPPETENCIES₁₉
INAPPRECIABLE₂₁
INAPPRECIABLY₂₄
INAPPROPRIATE₁₉
INARTICULATES₁₅
INATTENTIVELY₁₉
INAUDIBLENESS₁₆
INAUGURATIONS₁₄
INCALESCENCES₁₉
INCANDESCENCE₂₀
INCANDESCENCY₂₃
INCANDESCENTS₁₈
INCANTATIONAL₁₅
INCAPABLENESS₁₉
INCAPACITANTS₁₉
INCAPACITATED₂₀
INCAPACITATES₁₉
INCAPSULATING₁₈
INCAPSULATION₁₇
INCARCERATING₁₈
INCARCERATION₁₇
INCARCERATORS₁₇
INCARDINATING₁₇
INCARDINATION₁₆
INCARNADINING₁₇
INCARNATIONAL₁₅
INCATENATIONS₁₅
INCENDIARISMS₁₈
INCENDIVITIES₁₉
INCENTIVISING₁₉
INCENTIVIZING₂₈
INCERTAINTIES₁₅
INCESSANTNESS₁₅
INCINERATIONS₁₅
INCLEMENTNESS₁₇
INCLINATIONAL₁₅
INCLINATORIUM₁₇
INCLINOMETERS₁₇
INCLUSIVENESS₁₈
INCLUSIVITIES₁₈
INCOGITANCIES₁₈
INCOGNISANCES₁₈
INCOGNIZANCES₂₇
INCOHERENCIES₂₀
INCOMBUSTIBLE₂₁
INCOMBUSTIBLY₂₄
INCOMMISCIBLE₂₃
INCOMMODITIES₂₀
INCOMMUNICADO₂₂
INCOMPATIBLES₂₁
INCOMPETENCES₂₁
INCOMPETENTLY₂₂
INCOMPLETIONS₁₉
INCOMPLIANCES₂₁
INCOMPLIANTLY₂₂
INCOMPOSSIBLE₂₁
INCONCEIVABLE₂₂
INCONCEIVABLY₂₅
INCONCLUSIONS₁₇
INCONDENSABLE₁₈
INCONDENSIBLE₁₈
INCONGRUENCES₁₈
INCONGRUENTLY₁₉
INCONGRUITIES₁₆
INCONGRUOUSLY₁₉
INCONSCIENTLY₂₀
INCONSECUTIVE₂₀
INCONSEQUENCE₂₆
INCONSIDERATE₁₆
INCONSISTENCE₁₇
INCONSISTENCY₂₀
INCONSONANCES₁₇
INCONSONANTLY₁₈
INCONSPICUOUS₁₉
INCONSTANCIES₁₇
INCONSTRUABLE₁₇
INCONTESTABLE₁₇
INCONTESTABLY₂₀
INCONTINENCES₁₇
INCONTINENTLY₁₈
INCONVENIENCE₂₀
INCONVENIENCY₂₃
INCONVERSABLE₂₀
INCONVERTIBLE₂₀
INCONVERTIBLY₂₃
INCONVINCIBLE₂₂
INCONVINCIBLY₂₅
INCORONATIONS₁₅
INCORPORATING₁₈
INCORPORATION₁₇
INCORPORATIVE₂₀
INCORPORATORS₁₇
INCORPOREALLY₂₀
INCORRECTNESS₁₇
INCORRIGIBLES₁₈
INCORRUPTIBLE₁₉
INCORRUPTIBLY₂₂
INCORRUPTIONS₁₇
INCORRUPTNESS₁₇
INCRASSATIONS₁₅
INCREDIBILITY₂₁
INCREDULITIES₁₆
INCREDULOUSLY₁₉
INCREMENTALLY₂₀
INCRIMINATING₁₈
INCRIMINATION₁₇
INCRIMINATORS₁₇
INCRIMINATORY₂₀
INCROSSBREEDS₁₈
INCRUSTATIONS₁₅
INCULPABILITY₂₂
INCUMBERINGLY₂₃
INCUNABULISTS₁₇
INCURABLENESS₁₇
INCURIOSITIES₁₅
INCURIOUSNESS₁₅
INDEFATIGABLE₂₀
INDEFATIGABLY₂₃
INDEHISCENCES₂₁
INDELIBLENESS₁₆
INDENTURESHIP₁₉
INDEPENDENCES₁₉
INDEPENDENTLY₂₀
INDESCRIBABLE₂₀
INDESCRIBABLY₂₃
INDETERMINACY₂₁
INDETERMINATE₁₆
INDETERMINISM₁₈
INDETERMINIST₁₆
INDEXTERITIES₂₁
INDIFFERENCES₂₂
INDIFFERENTLY₂₃
INDIGESTIBLES₁₇
INDISCERNIBLE₁₈
INDISCERNIBLY₂₁
INDISCIPLINED₁₉
INDISCIPLINES₁₈
INDISCREETEST₁₆
INDISCRETIONS₁₆
INDISPENSABLE₁₈
INDISPENSABLY₂₁
INDISPOSITION₁₆
INDISSOCIABLE₁₈
INDISSOCIABLY₂₁
INDISSOLVABLE₁₉
INDISSUADABLE₁₇
INDISSUADABLY₂₀
INDISTINCTION₁₆
INDISTINCTIVE₁₉
INDIVIDUALISE₁₈
INDIVIDUALISM₂₀
INDIVIDUALIST₁₈
INDIVIDUALITY₂₁
INDIVIDUALIZE₂₇
INDIVIDUATING₁₉
INDIVIDUATION₁₈
INDIVIDUATORS₁₈
INDOCTRINATED₁₇
INDOCTRINATES₁₆
INDOCTRINATOR₁₆
INDOLEBUTYRIC₂₁
INDOMETHACINS₂₁
INDUCTILITIES₁₆
INDUCTIVENESS₁₉
INDUCTIVITIES₁₉
INDUPLICATION₁₈
INDUSTRIALISE₁₄
INDUSTRIALISM₁₆
INDUSTRIALIST₁₄
INDUSTRIALIZE₂₃
INDUSTRIOUSLY₁₇
INEDIBILITIES₁₆
INEDUCABILITY₂₁
INEFFABLENESS₂₁
INEFFECTIVELY₂₇
INEFFECTUALLY₂₄
INEFFICACIOUS₂₃
INEFFICIENTLY₂₄
INEGALITARIAN₁₄
INELABORATELY₁₈
INELASTICALLY₁₈
INELIGIBILITY₁₉
INELUDIBILITY₁₉
INERRABLENESS₁₅
INESCUTCHEONS₂₀
INEVITABILITY₂₁
INEXACTITUDES₂₃
INEXACTNESSES₂₂
INEXHAUSTIBLE₂₅
INEXHAUSTIBLY₂₈
INEXISTENCIES₂₂
INEXORABILITY₂₅
INEXPECTATION₂₄
INEXPEDIENCES₂₅
INEXPEDIENTLY₂₆
INEXPENSIVELY₂₈
INEXPERIENCED₂₅
INEXPERIENCES₂₄
INEXPLAINABLE₂₄
INEXPLAINABLY₂₇
INEXPRESSIBLE₂₄
INEXPRESSIBLY₂₇
INFALLIBILISM₂₀
INFALLIBILIST₁₈
INFALLIBILITY₂₁
INFANTILISING₁₇
INFANTILITIES₁₆
INFANTILIZING₂₆
INFEASIBILITY₂₁
INFECTIVENESS₂₁
INFECTIVITIES₂₁
INFECUNDITIES₁₉
INFERENTIALLY₁₉
INFERIORITIES₁₆
INFERNALITIES₁₆
INFERTILITIES₁₆
INFIBULATIONS₁₈
INFILTRATIONS₁₆
INFINITESIMAL₁₈
INFINITIVALLY₂₂
INFLAMMATIONS₂₀
INFLATIONISMS₁₈
INFLATIONISTS₁₆
INFLECTEDNESS₁₉
INFLEXIBILITY₂₈
INFLEXIONALLY₂₆
INFLEXIONLESS₂₃
INFLORESCENCE₂₀
INFLUENCEABLE₂₀
INFLUENTIALLY₁₉
INFOMEDIARIES₁₉
INFORMALITIES₁₈
INFORMATICIAN₂₀
INFORMATIONAL₁₈
INFORMATIVELY₂₄
INFORMATORILY₂₁
INFOTAINMENTS₁₈
INFRAPOSITION₁₈
INFRASPECIFIC₂₅
INFREQUENCIES₂₇
INFRINGEMENTS₁₉
INFRUCTUOUSLY₂₁
INFUNDIBULATE₁₉
INFURIATINGLY₂₀
INFUSIBLENESS₁₈
INGEMINATIONS₁₆
INGENERATIONS₁₄
INGENIOUSNESS₁₄
INGENUOUSNESS₁₄
INGRAFTATIONS₁₇
INGRAINEDNESS₁₅
INGRATIATIONS₁₄
INGRAVESCENCE₂₁
INGROWNNESSES₁₇
INGURGITATING₁₆
INGURGITATION₁₅
INHABITANCIES₂₀
INHABITATIONS₁₈
INHABITRESSES₁₈
INHALATORIUMS₁₈
INHARMONICITY₂₃
INHERITRESSES₁₆
INHOMOGENEITY₂₂
INHOMOGENEOUS₁₉
INHOSPITALITY₂₁
INHUMANNESSES₁₈
INIMICALITIES₁₇
INIMITABILITY₂₀
INITIALNESSES₁₃
INITIATRESSES₁₃
INJUDICIOUSLY₂₆
INJURIOUSNESS₂₀
INNOCUOUSNESS₁₅
INNOVATIONIST₁₆
INNOXIOUSNESS₂₀
INOBSERVANCES₂₀
INOBSERVANTLY₂₁
INOBSERVATION₁₈
INOBTRUSIVELY₂₁
INOCCUPATIONS₁₉
INOCULABILITY₂₀
INODOROUSNESS₁₄
INOFFENSIVELY₂₅
INOFFICIOUSLY₂₄
INOPERABILITY₂₀
INOPERCULATES₁₇
INOPPORTUNELY₂₀
INOPPORTUNITY₂₀
INORDINATIONS₁₄
INORGANICALLY₁₉
INOSCULATIONS₁₅
INQUILINITIES₂₂
INQUISITIONAL₂₂
INQUISITIVELY₂₈
INQUISITORIAL₂₂
INSALIVATIONS₁₆
INSALUBRITIES₁₅
INSANITATIONS₁₃
INSATIABILITY₁₈
INSATIATENESS₁₃
INSCRIPTIONAL₁₇
INSCRIPTIVELY₂₃
INSCULPTURING₁₈
INSECTIVOROUS₁₈
INSECTOLOGIES₁₆
INSECTOLOGIST₁₆
INSEMINATIONS₁₅
INSENSATENESS₁₃
INSENSIBILITY₁₈
INSENSITIVELY₁₉
INSENSITIVITY₁₉
INSENTIENCIES₁₅
INSIDIOUSNESS₁₄
INSIGNIFICANT₁₉
INSINCERITIES₁₅
INSINUATINGLY₁₇
INSIPIDNESSES₁₆
INSOCIABILITY₂₀
INSOLUBILISED₁₆
INSOLUBILISES₁₅
INSOLUBILIZED₂₅
INSOLUBILIZES₂₄
INSOLUBLENESS₁₅
INSOLVABILITY₂₁
INSOMNOLENCES₁₇
INSPECTORATES₁₇
INSPECTORSHIP₂₂
INSPIRATIONAL₁₅
INSPIRITINGLY₁₉
INSPIRITMENTS₁₇
INSPISSATIONS₁₅
INSTABILITIES₁₅
INSTALLATIONS₁₃
INSTANTANEITY₁₆
INSTANTANEOUS₁₃
INSTANTIATING₁₄
INSTANTIATION₁₃
INSTANTNESSES₁₃
INSTAURATIONS₁₃
INSTIGATINGLY₁₈
INSTILLATIONS₁₃
INSTINCTIVELY₂₁
INSTINCTIVITY₂₁
INSTINCTUALLY₁₈
INSTITUTIONAL₁₃
INSTITUTIVELY₁₉
INSTRUCTIONAL₁₅
INSTRUCTIVELY₂₁
INSTRUMENTALS₁₅
INSTRUMENTING₁₆
INSUBJECTIONS₂₄
INSUBORDINATE₁₆
INSUBSTANTIAL₁₅
INSUFFICIENCE₂₃
INSUFFICIENCY₂₆
INSUFFLATIONS₁₉
INSUPPORTABLE₁₉
INSUPPORTABLY₂₂
INSURRECTIONS₁₅
INSUSCEPTIBLE₁₉
INSUSCEPTIBLY₂₂
INTANGIBILITY₁₉
INTEGRABILITY₁₉
INTEGRALITIES₁₄
INTEGUMENTARY₁₉
INTELLECTIONS₁₅
INTELLECTUALS₁₅
INTELLIGENCER₁₆
INTELLIGENCES₁₆
INTELLIGENTLY₁₇
INTEMPERANCES₁₉
INTEMPERATELY₂₀
INTENERATIONS₁₃
INTENSENESSES₁₃
INTENSIONALLY₁₆
INTENSIVENESS₁₆
INTENTIONALLY₁₆
INTERACTIONAL₁₅
INTERACTIVELY₂₁
INTERACTIVITY₂₁
INTERAGENCIES₁₆
INTERBEDDINGS₁₈
INTERBEHAVIOR₂₁
INTERBOROUGHS₁₉
INTERBRANCHES₂₀
INTERBREEDING₁₇
INTERCALARIES₁₅
INTERCALARILY₁₈
INTERCALATING₁₆
INTERCALATION₁₅
INTERCALATIVE₁₈
INTERCELLULAR₁₅
INTERCEPTIONS₁₇
INTERCESSIONS₁₅
INTERCHAINING₁₉
INTERCHANGERS₁₉
INTERCHANGING₂₀
INTERCHANNELS₁₈
INTERCHAPTERS₂₀
INTERCIPIENTS₁₇
INTERCLAVICLE₂₀
INTERCLUSIONS₁₅
INTERCLUSTERS₁₅
INTERCOLONIAL₁₅
INTERCOLUMNAR₁₇
INTERCOMMUNAL₁₉
INTERCOMMUNED₂₀
INTERCOMMUNES₁₉
INTERCOMPARED₂₀
INTERCOMPARES₁₉
INTERCONNECTS₁₇
INTERCONVERTS₁₈
INTERCORTICAL₁₇
INTERCOUNTIES₁₅
INTERCOUPLING₁₈
INTERCROPPING₂₀
INTERCROSSING₁₆
INTERCULTURAL₁₅
INTERCULTURES₁₅
INTERCURRENCE₁₇
INTERCURRENTS₁₅
INTERDENTALLY₁₇
INTERDEPENDED₁₈
INTERDICTIONS₁₆
INTERDIFFUSED₂₁
INTERDIFFUSES₂₀
INTERDIGITATE₁₅
INTERDISTRICT₁₆
INTERDOMINION₁₆
INTERELECTRON₁₅
INTEREPIDEMIC₂₀
INTERESTINGLY₁₇
INTERFACIALLY₂₁
INTERFAMILIAL₁₈
INTERFERENCES₁₈
INTERFERINGLY₂₀
INTERFEROGRAM₁₉
INTERFLUENCES₁₈
INTERFOLIATED₁₇
INTERFOLIATES₁₆
INTERGALACTIC₁₈
INTERGLACIALS₁₆
INTERGRADIENT₁₅
INTERGRAFTING₁₈
INTERGRANULAR₁₄
INTERHOSPITAL₁₈
INTERINDUSTRY₁₇
INTERINVOLVED₂₀
INTERINVOLVES₁₉
INTERIORISING₁₄
INTERIORITIES₁₃
INTERIORIZING₂₃
INTERJACULATE₂₂
INTERJECTIONS₂₂
INTERJECTURAL₂₂
INTERKNITTING₁₈
INTERKNOTTING₁₈
INTERLACEMENT₁₇
INTERLAMINATE₁₅
INTERLANGUAGE₁₅
INTERLAYERING₁₇
INTERLINEALLY₁₆
INTERLINEARLY₁₆
INTERLINEATED₁₄
INTERLINEATES₁₃
INTERLINKAGES₁₈
INTERLOCATION₁₅
INTERLOCUTION₁₅
INTERLOCUTORS₁₅
INTERLOCUTORY₁₈
INTERLOCUTRIX₂₂
INTERLUNATION₁₃
INTERMARGINAL₁₆
INTERMARRIAGE₁₆
INTERMARRYING₁₉
INTERMAXILLAE₂₂
INTERMEDDLERS₁₇
INTERMEDDLING₁₈
INTERMEDIATED₁₇
INTERMEDIATES₁₆
INTERMEDIATOR₁₆
INTERMEMBRANE₁₉
INTERMETALLIC₁₇
INTERMINGLING₁₇
INTERMISSIONS₁₅
INTERMITTENCE₁₇
INTERMITTENCY₂₀
INTERMIXTURES₂₂
INTERMOUNTAIN₁₅
INTERNALISING₁₄
INTERNALITIES₁₃
INTERNALIZING₂₃
INTERNATIONAL₁₃
INTERNETWORKS₂₀
INTERNEURONAL₁₃
INTEROBSERVER₁₈
INTEROCEPTIVE₂₀
INTEROCEPTORS₁₇
INTEROPERABLE₁₇
INTEROPERATED₁₆
INTEROPERATES₁₅
INTERORBITALS₁₅
INTEROSCULANT₁₅
INTEROSCULATE₁₅
INTERPANDEMIC₂₀
INTERPARIETAL₁₅
INTERPARTICLE₁₇
INTERPELLANTS₁₅
INTERPELLATED₁₆
INTERPELLATES₁₅
INTERPELLATOR₁₅
INTERPERMEATE₁₇
INTERPERSONAL₁₅
INTERPETIOLAR₁₅
INTERPILASTER₁₅
INTERPLANTING₁₆
INTERPLEADERS₁₆
INTERPLEADING₁₇
INTERPOLATERS₁₅
INTERPOLATING₁₆
INTERPOLATION₁₅
INTERPOLATIVE₁₈
INTERPOLATORS₁₅
INTERPOSITION₁₅
INTERPRETABLE₁₇
INTERPRETABLY₂₀
INTERPRETATED₁₆
INTERPRETATES₁₅
INTERPRETRESS₁₅
INTERPROXIMAL₂₄
INTERPUNCTION₁₇
INTERQUARTILE₂₂
INTERRACIALLY₁₈
INTERRADIALLY₁₇
INTERRADIUSES₁₄
INTERREGIONAL₁₄
INTERRELATING₁₄
INTERRELATION₁₃
INTERROGATEES₁₄
INTERROGATING₁₅
INTERROGATION₁₄
INTERROGATIVE₁₇
INTERROGATORS₁₄
INTERROGATORY₁₇
INTERRUPTEDLY₁₉
INTERRUPTIBLE₁₇
INTERRUPTIONS₁₅
INTERSCAPULAR₁₇
INTERSCRIBING₁₈
INTERSECTIONS₁₅
INTERSEGMENTS₁₆
INTERSERVICES₁₈
INTERSESSIONS₁₃
INTERSEXUALLY₂₃
INTERSIDEREAL₁₄
INTERSOCIETAL₁₅
INTERSPECIFIC₂₂
INTERSPERSALS₁₅
INTERSPERSING₁₆
INTERSPERSION₁₅
INTERSTADIALS₁₄
INTERSTATIONS₁₃
INTERSTELLARY₁₆
INTERSTIMULUS₁₅
INTERSTITIALS₁₃
INTERSTRATIFY₁₉
INTERTANGLING₁₅
INTERTERMINAL₁₅
INTERTEXTURES₂₀
INTERTILLAGES₁₄
INTERTRAFFICS₂₁
INTERTROPICAL₁₇
INTERTWININGS₁₇
INTERTWISTING₁₇
INTERVENTIONS₁₆
INTERWORKINGS₂₁
INTERWREATHED₂₀
INTERWREATHES₁₉
INTIMIDATIONS₁₆
INTOLERATIONS₁₃
INTOXICATEDLY₂₆
INTOXICATIONS₂₂
INTRACAPSULAR₁₇
INTRACAVITARY₂₁
INTRACELLULAR₁₅
INTRACEREBRAL₁₇
INTRADERMALLY₁₉
INTRAGALACTIC₁₈
INTRAMUSCULAR₁₇
INTRANATIONAL₁₃
INTRANSIGEANT₁₄
INTRANSIGENCE₁₆
INTRANSIGENCY₁₉
INTRANSIGENTS₁₄
INTRAOCULARLY₁₈
INTRAPARIETAL₁₅
INTRAPERSONAL₁₅
INTRAPETIOLAR₁₅
INTRAPRENEURS₁₅
INTRASPECIFIC₂₂
INTRATELLURIC₁₅
INTRATHECALLY₂₁
INTRATHORACIC₂₀
INTRAVASATION₁₆
INTRAVASCULAR₁₈
INTRAVENOUSES₁₆
INTRAVENOUSLY₁₉
INTRENCHMENTS₂₀
INTREPIDITIES₁₆
INTRICATENESS₁₅
INTRINSICALLY₁₈
INTRODUCTIONS₁₆
INTROGRESSANT₁₄
INTROGRESSION₁₄
INTROGRESSIVE₁₇
INTROJECTIONS₂₂
INTROMISSIBLE₁₇
INTROMISSIONS₁₅
INTROSPECTING₁₈
INTROSPECTION₁₇
INTROSPECTIVE₂₀
INTROVERSIBLE₁₈
INTROVERSIONS₁₆
INTRUSIONISTS₁₃
INTRUSIVENESS₁₆
INTUITIONALLY₁₆
INTUITIONISMS₁₅
INTUITIONISTS₁₃
INTUITIVENESS₁₆
INTUMESCENCES₁₉
INTURBIDATING₁₇
INTUSSUSCEPTS₁₇
INVAGINATIONS₁₇
INVALIDATIONS₁₇
INVALIDNESSES₁₇
INVARIABILITY₂₁
INVECTIVENESS₂₁
INVEIGLEMENTS₁₉
INVENDIBILITY₂₂
INVENTIONLESS₁₆
INVENTIVENESS₁₉
INVENTORIABLE₁₈
INVENTORIALLY₁₉
INVERTEBRATES₁₈
INVERTIBILITY₂₁
INVESTIGATING₁₈
INVESTIGATION₁₇
INVESTIGATIVE₂₀
INVESTIGATORS₁₇
INVESTIGATORY₂₀
INVIABILITIES₁₈
INVIDIOUSNESS₁₇
INVIGILATIONS₁₇
INVIGORATIONS₁₇
INVINCIBILITY₂₃
INVIOLABILITY₂₁
INVIOLATENESS₁₆
INVISIBLENESS₁₈
INVITATIONALS₁₆
INVOLUCELLATE₁₈
INVOLUNTARILY₁₉
INVULTUATIONS₁₆
IONTOPHORESES₁₈
IONTOPHORESIS₁₈
IONTOPHORETIC₂₀
IPSILATERALLY₁₈
IRASCIBLENESS₁₇
IRKSOMENESSES₁₉
IRONMONGERIES₁₆
IRRATIONALISE₁₃
IRRATIONALISM₁₅
IRRATIONALIST₁₃
IRRATIONALITY₁₆
IRRATIONALIZE₂₂
IRRECIPROCITY₂₂
IRRECLAIMABLE₁₉
IRRECLAIMABLY₂₂
IRRECOGNITION₁₆
IRRECOVERABLE₂₀
IRRECOVERABLY₂₃
IRREDEEMABLES₁₈
IRREFLECTIONS₁₈
IRREFRANGIBLE₁₉
IRREFRANGIBLY₂₂
IRRELEVANCIES₁₈
IRRELIGIONIST₁₄
IRRELIGIOUSLY₁₇
IRREPLACEABLE₁₉
IRREPLACEABLY₂₂
IRREPLEVIABLE₂₀
IRREPRESSIBLE₁₇
IRREPRESSIBLY₂₀
IRRESISTANCES₁₅
IRRESOLUTIONS₁₃
IRRESPONSIBLE₁₇
IRRESPONSIBLY₂₀
IRRETRIEVABLE₁₈
IRRETRIEVABLY₂₁
IRREVERENTIAL₁₆
IRRITABLENESS₁₅
ISMATICALNESS₁₇
ISOAGGLUTININ₁₅
ISOALLOXAZINE₂₉
ISOANTIBODIES₁₆
ISOBAROMETRIC₁₉
ISOCARBOXAZID₃₄
ISOCHEIMENALS₂₀
ISOCHROMOSOME₂₂
ISOCHRONISING₁₉
ISOCHRONIZING₂₈
ISOCHRONOUSLY₂₁
ISODIMORPHISM₂₃
ISODIMORPHOUS₂₁
ISOELECTRONIC₁₇
ISOFLAVONOIDS₂₀
ISOGEOTHERMAL₁₉
ISOGEOTHERMIC₂₁
ISOLABILITIES₁₅
ISOLATIONISMS₁₅
ISOLATIONISTS₁₃
ISOMERISATION₁₅
ISOMERIZATION₂₄
ISOMETRICALLY₂₀
ISOPERIMETERS₁₇
ISOPRENALINES₁₅
ISOPROTERENOL₁₅
ISOSMOTICALLY₂₀
ISOSPONDYLOUS₁₉
ISOSTATICALLY₁₈
ISOSTHENURIAS₁₆
ISOTENISCOPES₁₇
ISOTONICITIES₁₅
ISOTRETINOINS₁₃
ISOTROPICALLY₂₀
ITALICISATION₁₅
ITALICIZATION₂₄
ITERATIVENESS₁₆
ITEROPARITIES₁₅
ITHYPHALLUSES₂₄

Letters by positionIn 70% of these words the 2nd letter is N.

2nd letter

N70%
M15%
R4%

3rd letter

T29%
C11%
P11%

4th letter

E37%
O13%
R10%

5th letter

R32%
N9%
A7%

11th letter

I30%
E11%
O11%

13th letter

S41%
Y21%
E11%

Highest-scoring words

Scrabble and Words With Friends points, before board bonuses

Score spreadMost of these words score 17 in Scrabble; ISOCARBOXAZID tops the list with 34. Scores before board bonuses.

1313 points: 34 words
14 points: 32 words
1515 points: 111 words
16 points: 96 words
1717 points: 121 words
18 points: 108 words
1919 points: 101 words
20 points: 99 words
2121 points: 66 words
22 points: 58 words
2323 points: 35 words
24 points: 33 words
2525 points: 17 words
26 points: 15 words
2727 points: 14 words
28 points: 6 words
2929 points: 1 words
30 points: 1 words
3131 points: 0 words
32 points: 0 words
3333 points: 0 words
34 points: 1 words

Word	Scrabble	Words With Friends	Dictionaries
ISOCARBOXAZID	34	36	All three
IMMUNOCOMPLEX	30	38	Collins only
ISOALLOXAZINE	29	32	All three
INEXPENSIVELY	28	32	All three
INFLEXIBILITY	28	31	All three
INCENTIVIZING	28	34	Collins · NWL
INQUISITIVELY	28	31	All three
INEXHAUSTIBLY	28	30	All three
ISOCHRONIZING	28	31	Collins only
INEFFECTIVELY	27	30	All three
INDIVIDUALIZE	27	31	All three
IMMORTALIZING	27	32	All three

These entries stretch from common vocabulary to technical terms, but only 38 rank among the top 25,000 English words by wordfreq frequency. “Investigation,” “independently,” and “institutional” are recognizable starting points. Dictionary coverage also varies: Collins has 921 entries, while NWL2023 has 661, so the totals overlap rather than add up to 949.

What stands out among 13-letter words starting with I

The list contains 949 entries, but just 38 are common by wordfreq frequency.
“International,” “investigation,” and “independently” are familiar examples.
“Isocarboxazid” leads the score list at 34; “immunocomplex” scores 30.
A final S is most common: 388 words end in S, compared with 197 ending in Y.
Collins includes 921 entries, NWL2023 661, and ENABLE 606.

Which I-starting words score highest?

“Isocarboxazid” leads at 34 points, followed by “immunocomplex” at 30 and “isoalloxazine” at 29. The next group scores 28: “inexpensively,” “inflexibility,” “incentivizing,” “inquisitively,” “inexhaustibly,” and “isochronizing.” Those are specialist or unusual terms, not everyday vocabulary.

More familiar choices include “investigation,” “illustrations,” and “installations.” The contrast matters: a large word count does not mean every entry will come to mind quickly, and the top scorers are not necessarily the easiest words to recognize or play.

How to narrow 13-letter words starting with I

Use the final letter as a quick, reliable filter. S leads with 388 entries, followed by Y with 197 and E with 105. For an S ending, try familiar examples such as “investigators,” “illustrations,” “installations,” and “interventions” before checking less familiar possibilities.

The main limitation is familiarity: just 38 entries are common by wordfreq frequency. Dictionary coverage differs too, so check your game's word list before relying on a rare term; Collins, NWL2023, and ENABLE do not include identical sets.

Questions people ask

How many 13-letter words start with I?

There are 949 13-letter words starting with I in the tournament-dictionary count. That total combines entries found in at least one of ENABLE, Collins, or NWL2023; it does not mean all 949 appear in every game’s word list.

What is the highest-scoring 13-letter word starting with I?

“Isocarboxazid” is the highest scorer at 34 points. “Immunocomplex” follows at 30, and “isoalloxazine” scores 29. The leader is a specialist term, so its high value does not make it an obvious everyday play.

Which common words start with I and have 13 letters?

“International,” “investigation,” and “independently” are recognizable examples among the 13-letter I words. Only 38 entries count as common English words, so many of the remaining options are uncommon or technical.

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