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There are 64 eighteen-letter words containing 2H, 2I, O and U

air-cushion␣vehicles air␣cushion␣vehiclesamphisphaeriaceousaphthous␣stomatitisarachibutyrophobiabowmouth␣guitarfishburn␣the␣midnight␣oilbutyrylthiocholinechemicotherapeuticchlorosulpholipidsChu-Harrington␣limitchurch␣affiliationsChurch␣Slavonicismsdiamonds␣in␣the␣roughdimethylsulphoxide dimethyl␣sulphoxidefought␣fire␣with␣firegoing␣out␣with␣the␣arkHeimlich␣manoeuversHeimlich␣manoeuvresHieroglyphic␣Luwianhighest-functioning highest␣functioninghistioneutrophilichistoarchitecturalhistoarchitecturesHoughton␣Saint␣GilesHungarian␣chamomilehydroflumethiazidehydrogen␣disulphidehydrosulphuric␣acidjump␣in␣with␣both␣feetlithium␣borohydridelithium␣perchlorateliving␣over␣the␣brushmicroneighbourhoodneighbouring␣rightsneoichthyosauriansneurohistochemicalneurophilosophicalnoughtwithstanding nought-withstanding nought␣withstandingPhiladelphia␣Countyphilosophunculistsphytohemagglutininphytohemaglutininepseudodiphtheriticpseudophilosophiespseudoxyrhophiinesrobin-run-in-the-hedgerunning␣for␣the␣hillsSchopenhauerianismsodium␣hypochloritesodiumthiosulphate sodium␣thiosulphatespurious␣diphthongssubdolichocephalicsulphochlorinationsulphonic␣anhydrideTauberbischofsheimtitular␣of␣the␣tithestriple␣witching␣hourwho␣writes␣this␣stuff

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 50 words
  • Spanish Wiktionary: no word
  • Italian Wiktionary: no word
  • German Wiktionary: 57 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 16 words

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