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There are 46 twenty-one-letter words containing I, 2O, P, R and X

alkylhydroperoxidasesaminopolycarboxylatescomplexity-hiding␣proxycomplex␣projective␣linecontrabass␣saxophonistcoordination␣complexesdeoxyribodipyrimidinedichlorophenoxyaceticdihydrodesoxymorphinedihydroxyacetophenonediketospirilloxanthinexploding␣head␣syndromeexploratory␣committeesexternopyramidisationexternopyramidizationGrelling-Nelson␣paradoxhexafluoroisopropanolhydroxynaphthoquinonehydroxyprostaglandinsinner␣orbital␣complexesisopropylthioxanthonelean␣nitrogen␣oxide␣traplexical␣correspondencemonocarboxypeptidasesmononeuritis␣multiplexneuropsychotoxicologyoperational␣exhaustionorthorhombic␣pyroxenesoxyiminocephalosporinpharmacotoxicologicalphotodecarboxylationsplexiform␣neurofibromaproduction␣externalitypterygomaxillary␣fossapyrrazolooxadiazepinepyrrolidonecarboxylicRNA␣expression␣profilesRoss-Littlewood␣paradoxsopranino␣saxophonistssopranissimo␣saxophonesphenomaxillary␣fossaeto␣a␣first␣approximationtoxicopharmacologicaltriacetone␣triperoxideWitherspoon-excludableWizard␣of␣Oz␣experiments

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 57 words
  • Spanish Wiktionary: no word
  • Italian Wiktionary: 1 word
  • German Wiktionary: 6 words
  • Portuguese Wiktionary: 1 word
  • Dutch Wiktionary: 1 word

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