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There are 107 eighteen-letter words containing H, 2O and 3P

alphaphotographicsaminophospholipidscephalaspidomorphsChappuis␣absorptioncommon␣hippopotamuscomparison␣shopperscomparison-shopping comparison␣shoppingcoproporphyrinogencorticohippocampaldextropropoxyphenediisopropylphenylsepipodophyllotoxinexopolyphosphataseglycophospholipidshepatosplenographyhippocampectomizedhippocampocorticalhyperphosphorylatehypophosphataemiashypophosphatasemiahypophosphoric␣acidhypophosphorylatedisopropylphosphatelepidopterophagouslipophosphoglycanslysophospholipasesnonphosphopeptidespalaeopropithecidspaleotopographicalpanhypoproteinemiapanhypoproteinemicparapodiapophysealperoxodiphosphatespharmacophenotypesphenophosphazininephenoxaphosphininePhilippine␣ironwoodphosphoglycolipidsphosphoisoprenoidsphospholipomannansphospholipoproteinphosphoneoepitopesphosphonopentanoicphosphonopyruvatesphosphopantetheinephosphopentomutasephosphoriboproteinphosphospecificityphotographic␣papersphotographic␣platesphoto␣opportunitiesphotophosphorylasephotoprecipitationphotospectroscopicphototopographicalphototypographicalphrasal␣prepositionphytotopographicalpicophotoautotrophpiezopsychrophilicPointe␣Coupee␣Parishpolydolopimorphianpolyphosphoric␣acidpolyphosphorylatedpolyplethysmographpolysporangiophytepopping␣the␣questionprephosphorylatingprephosphorylationprinter's␣apostropheproazaphosphatraneprocolophonomorphsprosopographicallyprotoporphyrinogenpseudohypertrophicpseudophilosopherspseudophilosophiespseudophosphatasespseudophotographicpseudophotospherespseudophylactocarppseudopornographicpseudopsychopathicpsychic␣photographypsychophilosophiespsychoprophylacticpyrophosphokinasespyrophosphoramidespyrophosphoric␣acidpyrophosphorolysispyrophosphorolyticpyrophosphorylasespyrophosphorylatedpyrophosphorylysespyrophosphorylysispyrophosphorylyticrockhopper␣penguinssole␣proprietorshipspectrophotographsspectrophotographysphingophosphatidespondyloepiphysealspondyloperipheralthiopyrophosphatesup␣the␣country␣peoplewoodchip␣wallpapers

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 29 words
  • Spanish Wiktionary: no word
  • Italian Wiktionary: no word
  • German Wiktionary: 5 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 2 words

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