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There are 66 twenty-one-letter words containing E, H, I, 2O and X

acetyloxytheophyllinealkyldihydroxyacetonealkylhydroperoxidasesarbitration␣of␣exchangeAx-Grothendieck␣theorembenzoylhydroxylaminescarbomonoxyhemoglobincarboxamidomethylatedcarboxyhemoglobinemiachenodesoxycholic␣acidchlorodeoxyadenosinescomplexity-hiding␣proxydibutylhydroxytoluenedichlorophenoxyaceticdicyclohexylammoniumsdihydrodesoxymorphinedihydroxyacetophenonedihydroxybenzoic␣acidsdiketospirilloxanthindimethoxyquinazolinesdimethylpolysiloxanesexchanging␣of␣contractsexocellobiohydrolasesexploding␣head␣syndromeexponential␣smoothingshemihexakisoctahedronheterogeneous␣mixtureshexachloroantimonateshexachlorofluoresceinhexafluoroantimonateshexafluoroisobutylenehexafluoroisopropanolhexafluorothioacetonehexahydroxoantimonatehexatriacontanoic␣acidhydroxyanthraquinoneshydroxycorticosteroidhydroxydeoxyguanosinehydroxyergocalciferolhydroxyethylrutosideshydroxyisovaleric␣acidhydroxymethylcytosinehydroxynaphthoquinoneichthyoallyeinotoxismisopropylthioxanthoneJoule-Thomson␣expansionmetaxylohydroquinonesmethoxycarbonylationsmitochondrial␣matrixesneuropsychotoxicologyoctamethyltrisiloxaneoperational␣exhaustionorthorhombic␣pyroxenesoxyiminocephalosporinpaleohexaploidisationpaleohexaploidizationphotodecarboxylationspolydimethylsiloxanesSerbian␣Orthodox␣Churchsopranissimo␣saxophonesphenomaxillary␣fossaesuxamethonium␣chloridetriacetoxyborohydridetricyclohexylammoniumtrihydroxycholesterolWitherspoon-excludable

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 37 words
  • Spanish Wiktionary: no word
  • Italian Wiktionary: no word
  • German Wiktionary: 1 word
  • Portuguese Wiktionary: 1 word
  • Dutch Wiktionary: no word

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