15-letter words starting with I

15-letter words starting with I number 505; internationally and interpretations are familiar examples, and the highest scores reach 32.

505 wordsTop pick INTERNATIONALLYHighest score ICHTHYOPHAGISTS 32

6 of 505 are everyday words (1%). 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 15-letter words (695); Y starts the fewest (2). I ranks #4 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

Best words to play first 505 · most-used first

INTERNATIONALLY₁₈
INTERPRETATIONS₁₇
INSTRUMENTATION₁₇
INTERCHANGEABLE₂₃
INCONSISTENCIES₁₉
IMPLEMENTATIONS₂₁
INAPPROPRIATELY₂₄
INSTANTANEOUSLY₁₈
INTERCHANGEABLY₂₆
INCONSEQUENTIAL₂₆
INFRASTRUCTURES₂₀
INTERCONNECTION₁₉
INTENSIFICATION₂₀
INCOMPATIBILITY₂₆
INDIVIDUALISTIC₂₂
INTERDEPENDENCE₂₁
INSUBORDINATION₁₈
INTERCOLLEGIATE₁₈
INTERVENTIONIST₁₈
IDENTIFICATIONS₂₁
INFRASTRUCTURAL₂₀
INSTRUMENTALIST₁₇
INVESTIGATIONAL₁₉
IMPROVISATIONAL₂₂
INTELLECTUALISM₁₉
INDEMNIFICATION₂₃
INEFFECTIVENESS₂₆
IMPRESSIONISTIC₂₁
INSTITUTIONALLY₁₈
INTERCONNECTING₂₀
INTERVENTIONISM₂₀
INTELLIGIBILITY₂₁
INTERNALIZATION₂₄
INSTRUMENTALITY₂₀
INVULNERABILITY₂₃
INACCESSIBILITY₂₄
INTERSCHOLASTIC₂₂
INFINITESIMALLY₂₃
INCONVENIENCING₂₃
INCOMPREHENSION₂₄
INTERFEROMETRIC₂₂
INTERPROVINCIAL₂₂
IMPOSSIBILITIES₂₁
IMMUNOGLOBULINS₂₂
INCONSPICUOUSLY₂₄
INTRAPERITONEAL₁₇
INDUSTRIALIZING₂₆
INTERFEROMETERS₂₀

Showing the top 48 of 505 words. See every valid word

All valid words 505

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

IATROGENICITIES₁₈
ICHTHYODORULITE₂₇
ICHTHYODORYLITE₃₀
ICHTHYOPHAGISTS₃₂
ICHTHYOSAURIANS₂₆
ICHTHYOSAURUSES₂₆
ICOSITETRAHEDRA₂₁
IDENTICALNESSES₁₈
IDENTIFICATIONS₂₁
IDEOGRAPHICALLY₂₇
IDIOMATICALNESS₂₀
IDIOMATICNESSES₂₀
IDIOMORPHICALLY₂₈
IDIOSYNCRATICAL₂₃
IDIOTICALNESSES₁₈
IGNOMINIOUSNESS₁₈
ILLEGALISATIONS₁₆
ILLEGALIZATIONS₂₅
ILLEGIBLENESSES₁₈
ILLEGITIMATIONS₁₈
ILLIBERALNESSES₁₇
ILLIMITABLENESS₁₉
ILLOGICALNESSES₁₈
ILLUSTRIOUSNESS₁₅
IMAGINARINESSES₁₈
IMAGINATIVENESS₂₁
IMITATIVENESSES₂₀
IMMATERIALISING₂₀
IMMATERIALITIES₁₉
IMMATERIALIZING₂₉
IMMEASURABILITY₂₄
IMMEDIATENESSES₂₀
IMMEDICABLENESS₂₄
IMMENSURABILITY₂₄
IMMERSIVENESSES₂₂
IMMISCIBILITIES₂₃
IMMISERISATIONS₁₉
IMMISERIZATIONS₂₈
IMMOBILISATIONS₂₁
IMMOBILIZATIONS₃₀
IMMORTALISATION₁₉
IMMORTALIZATION₂₈
IMMOVABLENESSES₂₄
IMMOVEABILITIES₂₄
IMMUNOASSAYABLE₂₄
IMMUNOASSAYISTS₂₂
IMMUNOBLOTTINGS₂₂
IMMUNOCHEMISTRY₂₉
IMMUNOCOMPETENT₂₅
IMMUNOCOMPLEXES₃₂
IMMUNODEFICIENT₂₅
IMMUNODIAGNOSES₂₁
IMMUNODIAGNOSIS₂₁
IMMUNODIFFUSION₂₆
IMMUNOGENETICAL₂₂
IMMUNOGENICALLY₂₅
IMMUNOGLOBULINS₂₂
IMMUNOLOGICALLY₂₅
IMMUNOMODULATOR₂₂
IMMUNOPATHOLOGY₂₈
IMMUNOREACTIONS₂₁
IMMUNOTHERAPIES₂₄
IMMUTABLENESSES₂₁
IMPALPABILITIES₂₃
IMPARTIALNESSES₁₉
IMPARTIBILITIES₂₁
IMPASSABILITIES₂₁
IMPASSIBILITIES₂₁
IMPASSIONEDNESS₂₀
IMPASSIVENESSES₂₂
IMPECCABILITIES₂₅
IMPECUNIOSITIES₂₁
IMPECUNIOUSNESS₂₁
IMPENETRABILITY₂₄
IMPERFECTNESSES₂₄
IMPERIOUSNESSES₁₉
IMPERISHABILITY₂₇
IMPERMEABLENESS₂₃
IMPERSCRIPTIBLE₂₅
IMPERSONALISING₂₀
IMPERSONALITIES₁₉
IMPERSONALIZING₂₉
IMPERTURBATIONS₂₁
IMPERVIABLENESS₂₄
IMPETUOUSNESSES₁₉
IMPLACABILITIES₂₃
IMPLAUSIBLENESS₂₁
IMPLEMENTATIONS₂₁
IMPLICATIVENESS₂₄
IMPOLITICNESSES₂₁
IMPONDERABILITY₂₅
IMPORTABILITIES₂₁
IMPORTUNATENESS₁₉
IMPOSSIBILITIES₂₁
IMPOSTHUMATIONS₂₄
IMPOVERISHMENTS₂₇
IMPRACTICALNESS₂₃
IMPRECISENESSES₂₁
IMPREGNABLENESS₂₂
IMPRESCRIPTIBLE₂₅
IMPRESCRIPTIBLY₂₈
IMPRESSIONISTIC₂₁
IMPROBABILITIES₂₃
IMPROVABILITIES₂₄
IMPROVISATIONAL₂₂
IMPROVISATORIAL₂₂
IMPROVISATRICES₂₄
IMPROVISATRIXES₂₉
IMPROVVISATORES₂₅
IMPROVVISATRICE₂₇
IMPULSIVENESSES₂₂
IMPUTABLENESSES₂₁
INACCESSIBILITY₂₄
INADMISSIBILITY₂₃
INADVISABLENESS₂₁
INALIENABLENESS₁₇
INALTERABLENESS₁₇
INANIMATENESSES₁₇
INAPPLICABILITY₂₆
INAPPRECIATIONS₂₁
INAPPREHENSIBLE₂₄
INAPPREHENSIONS₂₂
INAPPROPRIATELY₂₄
INARTICULATIONS₁₇
INATTENTIVENESS₁₈
INAUDIBLENESSES₁₈
INCALCULABILITY₂₄
INCANDESCENCIES₂₂
INCAPABLENESSES₂₁
INCAPACIOUSNESS₂₁
INCAPACITATIONS₂₁
INCENTIVISATION₂₀
INCENTIVIZATION₂₉
INCESSANTNESSES₁₇
INCLEMENTNESSES₁₉
INCLUSIVENESSES₂₀
INCOMMENSURABLE₂₃
INCOMMENSURABLY₂₆
INCOMMUNICATIVE₂₆
INCOMMUTABILITY₂₆
INCOMPARABILITY₂₆
INCOMPATIBILITY₂₆
INCOMPREHENSION₂₄
INCOMPREHENSIVE₂₇
INCOMPUTABILITY₂₆
INCONGRUOUSNESS₁₈
INCONSECUTIVELY₂₅
INCONSEQUENTIAL₂₆
INCONSIDERATELY₂₁
INCONSIDERATION₁₈
INCONSISTENCIES₁₉
INCONSOLABILITY₂₂
INCONSPICUOUSLY₂₄
INCONVENIENCIES₂₂
INCONVENIENCING₂₃
INCOORDINATIONS₁₈
INCORRECTNESSES₁₉
INCORRIGIBILITY₂₃
INCORRUPTNESSES₁₉
INCREDIBILITIES₂₀
INCREDULOUSNESS₁₈
INCREMENTALISMS₂₁
INCREMENTALISTS₁₉
INCROSSBREEDING₂₁
INCULPABILITIES₂₁
INCURABLENESSES₁₉
INCURIOUSNESSES₁₇
INDEFEASIBILITY₂₄
INDEFECTIBILITY₂₆
INDEFENSIBILITY₂₄
INDEFINABLENESS₂₁
INDELIBLENESSES₁₈
INDEMNIFICATION₂₃
INDETERMINACIES₂₀
INDETERMINATELY₂₁
INDETERMINATION₁₈
INDETERMINISTIC₂₀
INDIFFERENTISMS₂₄
INDIFFERENTISTS₂₂
INDIGENISATIONS₁₇
INDIGENIZATIONS₂₆
INDIGESTABILITY₂₂
INDIGESTIBILITY₂₂
INDISCIPLINABLE₂₂
INDISCRETIONARY₂₁
INDISPUTABILITY₂₃
INDISSOLUBILITY₂₁
INDISTINCTIVELY₂₄
INDISTRIBUTABLE₂₀
INDIVIDUALISERS₂₀
INDIVIDUALISING₂₁
INDIVIDUALISTIC₂₂
INDIVIDUALITIES₂₀
INDIVIDUALIZERS₂₉
INDIVIDUALIZING₃₀
INDIVISIBLENESS₂₁
INDOCTRINATIONS₁₈
INDOMITABLENESS₂₀
INDUBITABLENESS₂₀
INDUCTIVENESSES₂₁
INDUSTRIALISING₁₇
INDUSTRIALIZING₂₆
INDUSTRIOUSNESS₁₆
INEDUCABILITIES₂₀
INEFFABLENESSES₂₃
INEFFACEABILITY₂₈
INEFFECTIVENESS₂₆
INEFFECTUALNESS₂₃
INEFFICACIOUSLY₂₈
INELIGIBILITIES₁₈
INELUDIBILITIES₁₈
INEQUITABLENESS₂₆
INERADICABILITY₂₃
INERRABLENESSES₁₇
INESTIMABLENESS₁₉
INEVITABILITIES₂₀
INEXCUSABLENESS₂₆
INEXORABILITIES₂₄
INEXPENSIVENESS₂₇
INEXPLICABILITY₃₁
INEXPUGNABILITY₃₀
INEXTENSIBILITY₂₇
INEXTRICABILITY₂₉
INFALLIBILITIES₂₀
INFANTILISATION₁₈
INFANTILIZATION₂₇
INFEASIBILITIES₂₀
INFECTIVENESSES₂₃
INFINITESIMALLY₂₃
INFLAMMABLENESS₂₄
INFLECTEDNESSES₂₁
INFLEXIBILITIES₂₇
INFORMATIONALLY₂₃
INFORMATIVENESS₂₃
INFRALAPSARIANS₂₀
INFRANGIBLENESS₂₁
INFRASTRUCTURAL₂₀
INFRASTRUCTURES₂₀
INFUNDIBULIFORM₂₆
INFUSIBLENESSES₂₀
INGENIOUSNESSES₁₆
INGENUOUSNESSES₁₆
INGRAINEDNESSES₁₇
INHARMONICITIES₂₂
INHERITABLENESS₂₀
INHOMOGENEITIES₂₁
INHOSPITALITIES₂₀
INIMITABILITIES₁₉
INITIALISATIONS₁₅
INITIALIZATIONS₂₄
INJUDICIOUSNESS₂₅
INJURIOUSNESSES₂₂
INNOCUOUSNESSES₁₇
INNOXIOUSNESSES₂₂
INNUMERABLENESS₁₉
INOBTRUSIVENESS₂₀
INOCULABILITIES₁₉
INODOROUSNESSES₁₆
INOFFENSIVENESS₂₄
INOFFICIOUSNESS₂₃
INOPERABILITIES₁₉
INOPERATIVENESS₂₀
INOPPORTUNENESS₁₉
INOPPORTUNITIES₁₉
INORGANISATIONS₁₆
INORGANIZATIONS₂₅
INQUISITIONISTS₂₄
INQUISITIVENESS₂₇
INQUISITORIALLY₂₇
INSATIABILITIES₁₇
INSATIATENESSES₁₅
INSCRIBABLENESS₂₁
INSCRUTABLENESS₁₉
INSENSATENESSES₁₅
INSENSIBILITIES₁₇
INSENSITIVENESS₁₈
INSENSITIVITIES₁₈
INSEPARABLENESS₁₉
INSIDIOUSNESSES₁₆
INSIGNIFICANCES₂₃
INSIGNIFICANTLY₂₄
INSIGNIFICATIVE₂₄
INSOCIABILITIES₁₉
INSOLUBLENESSES₁₇
INSOLVABILITIES₂₀
INSPIRATIONALLY₂₀
INSPIRATIONISMS₁₉
INSPIRATIONISTS₁₇
INSTANTANEITIES₁₅
INSTANTANEOUSLY₁₈
INSTINCTIVITIES₂₀
INSTITUTIONALLY₁₈
INSTRUCTIVENESS₂₀
INSTRUCTORSHIPS₂₂
INSTRUMENTALISM₁₉
INSTRUMENTALIST₁₇
INSTRUMENTALITY₂₀
INSTRUMENTATION₁₇
INSUBORDINATELY₂₁
INSUBORDINATION₁₈
INSUBSTANTIALLY₂₀
INSUFFICIENCIES₂₅
INSUPERABLENESS₁₉
INSURRECTIONARY₂₀
INSURRECTIONISM₁₉
INSURRECTIONIST₁₇
INTANGIBILITIES₁₈
INTEGRABILITIES₁₈
INTEGRATIONISTS₁₆
INTELLECTUALISE₁₇
INTELLECTUALISM₁₉
INTELLECTUALIST₁₇
INTELLECTUALITY₂₀
INTELLECTUALIZE₂₆
INTELLIGENTSIAS₁₆
INTELLIGENTZIAS₂₅
INTELLIGIBILITY₂₁
INTEMPERATENESS₁₉
INTENSIFICATION₂₀
INTENSIVENESSES₁₈
INTERACTIONISMS₁₉
INTERACTIONISTS₁₇
INTERACTIVITIES₂₀
INTERAMBULACRAL₂₁
INTERAMBULACRUM₂₃
INTERANIMATIONS₁₇
INTERBEHAVIORAL₂₃
INTERCHANGEABLE₂₃
INTERCHANGEABLY₂₆
INTERCHANGEMENT₂₃
INTERCLAVICULAR₂₂
INTERCOLLEGIATE₁₈
INTERCOLONIALLY₂₀
INTERCOMMUNIONS₂₁
INTERCOMPARISON₂₁
INTERCONNECTING₂₀
INTERCONNECTION₁₉
INTERCONNECTORS₁₉
INTERCONNEXIONS₂₄
INTERCONVERSION₂₀
INTERCONVERTING₂₁
INTERCORRELATED₁₈
INTERCORRELATES₁₇
INTERCULTURALLY₂₀
INTERDEPENDENCE₂₁
INTERDEPENDENCY₂₄
INTERDEPENDENTS₁₉
INTERDIFFUSIONS₂₂
INTERDIGITATING₁₈
INTERDIGITATION₁₇
INTERDIVISIONAL₁₉
INTERELECTRODES₁₈
INTERELECTRONIC₁₉
INTERESTINGNESS₁₆
INTERFASCICULAR₂₂
INTERFEROMETERS₂₀
INTERFEROMETRIC₂₂
INTERFRATERNITY₂₁
INTERGENERATION₁₆
INTERGRADATIONS₁₇
INTERINDIVIDUAL₂₀
INTERINFLUENCED₂₁
INTERINFLUENCES₂₀
INTERIORISATION₁₅
INTERIORIZATION₂₄
INTERJACULATING₂₅
INTERJACULATORY₂₇
INTERJECTIONARY₂₇
INTERLACUSTRINE₁₇
INTERLAMINATING₁₈
INTERLAMINATION₁₇
INTERLINEATIONS₁₅
INTERLOCUTORILY₂₀
INTERLOCUTRICES₁₉
INTERLOCUTRIXES₂₄
INTERMEDIATIONS₁₈
INTERMIGRATIONS₁₈
INTERMINABILITY₂₂
INTERMITTENCIES₁₉
INTERMODULATION₁₈
INTERNALISATION₁₅
INTERNALIZATION₂₄
INTERNATIONALLY₁₈
INTERNETWORKING₂₃
INTERNUCLEOTIDE₁₈
INTEROPERATIVES₂₀
INTEROSCULATING₁₈
INTEROSCULATION₁₇
INTERPAROXYSMAL₂₉
INTERPELLATIONS₁₇
INTERPENETRABLE₁₉
INTERPENETRATED₁₈
INTERPENETRATES₁₇
INTERPERCEPTUAL₂₁
INTERPERMEATING₂₀
INTERPERSONALLY₂₀
INTERPHALANGEAL₂₁
INTERPOPULATION₁₉
INTERPRETATIONS₁₇
INTERPRETERSHIP₂₂
INTERPRETRESSES₁₇
INTERPROVINCIAL₂₂
INTERPUNCTUATED₂₀
INTERPUNCTUATES₁₉
INTERROGATINGLY₂₀
INTERROGATIONAL₁₆
INTERROGATIVELY₂₂
INTERROGATORIES₁₆
INTERROGATORILY₁₉
INTERRUPTEDNESS₁₈
INTERSCHOLASTIC₂₂
INTERSECTIONALS₁₇
INTERSEXUALISMS₂₄
INTERSTRATIFIED₁₉
INTERSTRATIFIES₁₈
INTERSUBJECTIVE₂₉
INTERTANGLEMENT₁₈
INTERTENTACULAR₁₇
INTERTEXTUALITY₂₅
INTERTWINEMENTS₂₀
INTERTWISTINGLY₂₂
INTERUNIVERSITY₂₁
INTERVALOMETERS₂₀
INTERVENTIONISM₂₀
INTERVENTIONIST₁₈
INTERVISIBILITY₂₃
INTERVISITATION₁₈
INTERWEAVEMENTS₂₃
INTOLERABLENESS₁₇
INTRACELLULARLY₂₀
INTRACEREBRALLY₂₂
INTRACTABLENESS₁₉
INTRADERMICALLY₂₃
INTRAFASCICULAR₂₂
INTRAMUSCULARLY₂₂
INTRANSIGEANCES₁₈
INTRANSIGEANTLY₁₉
INTRANSIGENCIES₁₈
INTRANSIGENTISM₁₈
INTRANSIGENTIST₁₆
INTRANSMISSIBLE₁₉
INTRAPERITONEAL₁₇
INTRAPOPULATION₁₉
INTRAPRENEURIAL₁₇
INTRAVASCULARLY₂₃
INTRICATENESSES₁₇
INTRINSICALNESS₁₇
INTROSPECTIONAL₁₉
INTROSPECTIVELY₂₅
INTROSUSCEPTION₁₉
INTRUSIVENESSES₁₈
INTUITIONALISMS₁₇
INTUITIONALISTS₁₅
INTUITIVENESSES₁₈
INTUSSUSCEPTING₂₀
INTUSSUSCEPTION₁₉
INTUSSUSCEPTIVE₂₂
INVARIABILITIES₂₀
INVECTIVENESSES₂₃
INVENDIBILITIES₂₁
INVENTIVENESSES₂₁
INVERTIBILITIES₂₀
INVESTIGATIONAL₁₉
INVIDIOUSNESSES₁₉
INVINCIBILITIES₂₂
INVIOLABILITIES₂₀
INVIOLATENESSES₁₈
INVISIBLENESSES₂₀
INVOLUNTARINESS₁₈
INVULNERABILITY₂₃
IONOSPHERICALLY₂₅
IRASCIBLENESSES₁₉
IRRATIONALISING₁₆
IRRATIONALISTIC₁₇
IRRATIONALITIES₁₅
IRRATIONALIZING₂₅
IRRECIPROCITIES₂₁
IRRECONCILABLES₂₁
IRRECONCILEMENT₂₁
IRREDEEMABILITY₂₃
IRREDUCIBLENESS₂₀
IRREDUCTIBILITY₂₃
IRREFORMABILITY₂₅
IRREFRAGABILITY₂₄
IRREFUTABLENESS₂₀
IRRELIGIOUSNESS₁₆
IRREMISSIBILITY₂₂
IRREMOVABLENESS₂₂
IRREPARABLENESS₁₉
IRREPEALABILITY₂₂
IRREPREHENSIBLE₂₂
IRREPREHENSIBLY₂₅
IRRESISTABILITY₂₀
IRRESISTIBILITY₂₀
IRRESOLVABILITY₂₃
IRRETENTIVENESS₁₈
IRREVERSIBILITY₂₃
IRREVOCABLENESS₂₂
IRRITABLENESSES₁₇
ISMATICALNESSES₁₉
ISOIMMUNISATION₁₉
ISOIMMUNIZATION₂₈
ISOPERIMETRICAL₂₁
ISOTHIOCYANATES₂₃
ITERATIVENESSES₁₈

Letters by positionIn 71% of these words the 2nd letter is N.

2nd letter

N71%
M17%
R6%

3rd letter

T30%
P10%
C8%

4th letter

E39%
O11%
U11%

5th letter

R30%
N10%
S6%

13th letter

I38%
S17%
E17%

15th letter

S54%
Y19%
N7%

Highest-scoring words

Scrabble and Words With Friends points, before board bonuses

Score spreadMost of these words score 20 in Scrabble; ICHTHYOPHAGISTS tops the list with 32. Scores before board bonuses.

1515 points: 10 words
16 points: 16 words
1717 points: 43 words
18 points: 54 words
1919 points: 57 words
20 points: 65 words
2121 points: 60 words
22 points: 44 words
2323 points: 38 words
24 points: 38 words
2525 points: 22 words
26 points: 20 words
2727 points: 14 words
28 points: 8 words
2929 points: 9 words
30 points: 4 words
3131 points: 1 words
32 points: 2 words

Word	Scrabble	Words With Friends	Dictionaries
ICHTHYOPHAGISTS	32	31	Collins only
IMMUNOCOMPLEXES	32	40	Collins only
INEXPLICABILITY	31	36	All three
INDIVIDUALIZING	30	36	All three
IMMOBILIZATIONS	30	35	All three
ICHTHYODORYLITE	30	28	Collins only
INEXPUGNABILITY	30	36	Collins only
INTERSUBJECTIVE	29	36	All three
IMMUNOCHEMISTRY	29	33	All three
IMMATERIALIZING	29	34	All three
IMPERSONALIZING	29	35	All three
INEXTRICABILITY	29	32	All three

The I list has more entries than the same-length H list, but far fewer than the P list. Its words range from internationally to specialist terms such as ichthyophagists. Just 6 entries rank among the most common English words, so expect many long, technical choices rather than everyday vocabulary.

I words at a glance

505 entries begin with I and have 15 letters; 382 have definitions.
Collins accepts 494, compared with 333 in NWL2023 and 308 in ENABLE.
Only 6 rank among the most common English words; internationally and interpretations are familiar examples.
Ending S dominates: 275 words, versus 95 ending in Y and 33 ending in N.
ichthyophagists and immunocomplexes tie for the top score at 32.

Why do so many 15-letter I words end in S?

A plural or inflected form often stretches a long base word to 15 letters, which helps explain the 275 entries ending in S. The next common ending is Y, with 95 words; N follows at 33. When a clue gives the final letter, S narrows the search sharply.

The dictionary totals also differ: Collins has 494 entries, while NWL2023 has 333 and ENABLE has 308. Those totals overlap, so they are not separate piles to add together. Check your game's word list before relying on an unfamiliar entry.

How to use 15-letter words starting with I

For a word-length clue, start with recognizable forms such as internationally, interpretations, or interchangeable. If the ending is S, the large S group gives you a sensible first filter; if it ends in Y, the smaller group is easier to scan.

For scoring, immunocomplexes and ichthyophagists each score 32, while inexplicability scores 31. Those standout totals contrast with the average score of 21.1. The trade-off is familiarity: only 6 entries are common, so a high scorer is not necessarily a word you will spot quickly.

Questions people ask

How many 15-letter words starting with I are there?

There are 505 entries that start with I and contain 15 letters. The dictionary totals vary: Collins includes 494, NWL2023 includes 333, and ENABLE includes 308. Only 6 entries rank among the most common English words, so many choices are specialized.

Which 15-letter I word has the highest score?

ichthyophagists and immunocomplexes share the highest score, at 32 each. Inexplicability is next at 31. The average score across the I list is 21.1, so these two words sit well above the typical entry.

Do most 15-letter words starting with I end in S?

Yes. A total of 275 entries end in S, making it the most frequent final letter by a wide margin. Y is next with 95, followed by N with 33. If your clue gives the last letter, checking S first is a strong starting point.

Keep going

Related lists

14-letter words start with I

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