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There are 74 eighteen-letter words containing I, 2M, 2S and Y

ad-hoc␣polymorphismsAlzheimer's␣syndromeantisymmetrisationBoundary␣Commissioncommissary␣generalscommodity␣fetishismDewey␣Decimal␣Systemdissymmetrizationsdysplasminogenemiadysplasminogenemicelectroimmunoassayeliminatory␣systemsenzymoimmunoassaysepididymovasostomyfluoroimmunoassaysget␣it␣out␣of␣my␣systemHis␣Imperial␣MajestyHolmes-Adie␣syndromehomobasidiomyceteshypermetamorphosishypersomatotropismimmunodysfunctionsimmunotrypanolysisinformation␣systemsinnate␣immune␣systemking␣oyster␣mushroomLindenmayer␣systemsluminoimmunoassayslymphangiosarcomasmagnetoasymmetriesmagnetogasdynamicsmancude-ring␣systemsmanganpyrosmalitesmedium␣spiny␣neuronsmemory␣institutionsmesenchymalisationmetalloimmunoassaymethylsulfenamidesmisaminoacylationsmisery␣loves␣companymulti-academy␣trustsmultiple␣star␣systemMymensingh␣DistrictMymensingh␣Divisionneurolymphomatosisnominal␣type␣systemsnonterminal␣symbols non-terminal␣symbolsphysicochemicalismphysicomathematicspiriformis␣syndromepostcommissurotomypulmonary␣embolismsradioimmunoassayedrhythmic␣gymnasticssemisymmetrizationsemisystematicallysingle-ply␣membranessmall␣penis␣syndromesomnambulisticallysubpsychotomimeticsummability␣methodssummary␣proceedingssupersymmetricallysymmetric␣functionssympathicomimeticssymplectic␣matricessymplectomorphismssystems␣programmingTommy␣John␣surgeriesvasoepididymostomyWestminster␣systemswithdrawal␣symptomsyucking␣someone's␣yum

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 61 words
  • Spanish Wiktionary: 1 word
  • Italian Wiktionary: no word
  • German Wiktionary: 23 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 10 words

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