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There are 60 eighteen-letter words containing A, I, 2O, P, S and X

antibioprophylaxisbaritone␣saxophonesbisdioxopiperazinebisperoxovanadatesbisperoxovanadiumsbox␣and␣whisker␣plotsbox␣and␣whiskers␣plotCambrian␣explosionscofactor␣expansionscompleteness␣axiomsdeacetoxyscirpenoldiacetoxyscirpenolexoatmosphericallyexopolysaccharidesexopolysaccharidicexponential␣growthsexponential␣objectsextraphilosophicalextraphysiologicalex-tropical␣cyclonesfluxional␣compoundshappy␣as␣a␣box␣of␣birdsheptaoxodisilicatehexabromobiphenylshydroperoxidationshydroperoxyflavinshydroperoxylationshydrostatic␣paradoxhydroxyperoxidasesmethylpolysiloxaneneurosporaxanthineneurotoxoplasmosisopening␣Pandora's␣boxoverapproximations over-approximationsoverextrapolationsoxazaphospholidineparadoxes␣of␣fictionperoxodiphosphatesphenoxaphosphininephosphorus␣cachexiaphotoperoxidationspolyphenoloxidasespolyvinylsiloxanespositional␣asphyxiapotassium␣hydroxideproofs␣by␣exhaustionpseudoexacerbationpseudoexfoliationssafety-deposit␣boxessexual␣reproductionsopranino␣saxophonesoprano␣saxophonistsoprillo␣saxophonessympathoexcitationsympathoexcitatorythromboprophylaxisunderexploitationsvinylpolysiloxanesxylopolysaccharide

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 67 words
  • Spanish Wiktionary: 4 words
  • Italian Wiktionary: no word
  • German Wiktionary: 7 words
  • Portuguese Wiktionary: 1 word
  • Dutch Wiktionary: 5 words

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