There are 362 words with the prefix IL in our word list of 382,657 words, and every one of them is on this page — grouped by length so you can scan fast, with a live filter when you need something narrower. The biggest group is the 10-letter words (60 of them); the spread is 4 of them 3 letters long, 10 of them 4 letters long, 18 of them 5 letters long, 25 of them 6 letters long, and more up to 15 letters. The longest entries are iliohypogastric, illdisposedness and illegitimatised. Word-game players keep lists like this open for a reason: Scrabble and Words With Friends reward the obscure corners of the dictionary, crossword solvers live on pattern matching, and Wordle players work by elimination.
The prefix IL- means not — a form of in- used before l (illegal, illogical, illegible) — three examples from this page: ilama, ilea, ileac.
The full list
3-letter words (4)
ila ile ilk ill
4-letter words (10)
ilea ilex ilia ilka ilks ills illy ilot ilth ilya
5-letter words (18)
ilama ileac ileal ileon ileum ileus iliac iliad ilial ilian iliau ilima ilion ilium iller illth illus iloko
6-letter words (25)
ilexes iliads iliahi ilices ilicic ilicin ilkane illano illeck illect illess illest illiad illing illipe illish illite illium illths illude illume illupi illure illust ilysia
7-letter words (39)
ileitis ilesite ileuses iliacus iliadic ilissus ilkaday illamon illanun illapse illbred illegal illeism illeist illfare illiads illicit illipes illites illitic illness illocal illogic illoyal illuded illuder illudes illumed illumer illumes illupis illusor illuvia illyric ilocano ilokano ilongot ilpirra ilvaite
8-letter words (33)
ileotomy iliadist iliadize ilkadays illabile illaenus illapsed illapses illation illative illegals illguide illhumor illicium illinium illinois illipene illiquid illision illogics illuding illumine illuming illusion illusive illusory illustre illutate illuvial illuvium illyrian ilmenite ilysioid
9-letter words (40)
ileectomy ileitides ileocecal ileocolic ileostomy ilicaceae iliopsoas iliopubic illapsing illapsive illations illatives illegally illegible illegibly illguided illiberal illicitly illighten illimited illiniums illinoian illiteral illnature illnesses illocally illogical illoyalty illudedly illumined illuminee illuminer illumines illusible illusions illuviate illuviums illuvivia ilmenites ilysiidae
10-letter words (60)
ileocaecal ileocaecum ilicaceous iliocaudal iliocostal iliodorsal iliolumbar iliopelvic iliosacral iliospinal iliotibial ilixanthin illaborate illapsable illaqueate illatively illaudable illaudably illegalise illegality illegalize illeviable illguiding illhumored illigation illimitate illinition illinoisan illiquidly illiteracy illiterate illiterati illocality illocution illogician illogicity illoricata illoricate illucidate illuminant illuminate illuminati illuminato illumining illuminism illuminist illuminize illuminous illumonate illurement illusional illusioned illusively illusorily illustrate illustrous illutation illuviated ilmenitite ilysanthes
11-letter words (42)
ileocolitis ileostomies iliofemoral ilioischiac iliopsoatic iliosciatic ilioscrotal illaqueable illaudation illaudatory illecebrous illegalised illegalized illegalness illiberally illicitness illimitable illimitably illimitedly illinoisian illiquation illiquidity illiterates illogically illoricated illtempered illuminable illuminance illuminated illuminates illuminator illuminatus illusionary illusionism illusionist illustrable illustrated illustrates illustrator illustrious illuviating illuviation
12-letter words (44)
ileocolotomy iliocaudalis iliocostales iliocostalis ilioinguinal ilioperoneal illaqueation illegalising illegalities illegalizing illegibility illegitimacy illegitimate illiberalise illiberalism illiberality illiberalize illimitation illiteracies illiterately illiterature illogicality illtreatment illucidation illucidative illuminating illumination illuminatism illuminatist illuminative illuminators illuminatory illuministic illusionable illusionists illusiveness illusoriness illustrating illustration illustrative illustrators illustratory illustricity ilmenorutile
13-letter words (23)
ileocolostomy iliococcygeal iliococcygeus iliococcygian ilioischiatic iliopectineal illachrymable illecebraceae illecebration illegibleness illegitimated illiberalized illiberalness illimitedness illogicalness illuminations illuminometer illusionistic illustratable illustrations illustratress illustriously illustrissimo
14-letter words (17)
illegalisation illegalization illegitimacies illegitimately illegitimating illegitimation illegitimatise illegitimatize illiberalizing illimitability illiterateness illogicalities illuminability illuminatingly illuminational illustrational illustratively
15-letter words (7)
iliohypogastric illdisposedness illegitimatised illegitimatized illimitableness illmanneredness illustriousness
Frequently asked questions
How many words with the prefix IL are there?
Our word list contains 362 words with the prefix IL, out of 382,657 entries in total. They run from 3 to 15 letters, and the 10-letter group is the largest with 60 words.
What are the longest words with the prefix IL?
The longest are iliohypogastric (15 letters), illdisposedness (15 letters) and illegitimatised (15 letters).
Which words with the prefix IL score highest in Scrabble?
By raw letter values, the top scorers on this page are illegitimatized (28 points), iliohypogastric (26 points) and illegitimatize (26 points) — before any letter or word multipliers. One honest caveat: this list is a broad English word list, so a few rare or technical entries appear that official game dictionaries (and Wordle’s answer list) do not accept. Always check a play against the dictionary your game uses.
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