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There are 30 eighteen-letter words containing F, M, 2O, S and 2U

amounts␣of␣substanceanonymous␣functionsatomic␣buffalo␣turdsbituminosulfonatesbowmouth␣guitarfishFaà␣di␣Bruno's␣formulafibrogranulomatousfluoroimmunoassaysfluoroimmunosensorfluxional␣compoundsgranulofilamentousgranuloma␣fungoideshomogenous␣functionimmunodysfunctionsimmunoflourescenceimmunofluorescenceimmunofluorographsLonely␣Star␣of␣Autumnluminofluorescenceluminosity␣functionmember␣of␣upper␣housemouthfuls␣of␣marblesmutual␣informationsPortuguese␣man-of-warPortuguese␣men-of-warput␣out␣of␣one's␣miserySturm-Liouville␣formsuck␣out␣of␣one's␣thumbsulfur-bottom␣whalestoluenesulfonamide

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 16 words
  • Spanish Wiktionary: 1 word
  • Italian Wiktionary: no word
  • German Wiktionary: 5 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: no word

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