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There are 52 twenty-one-letter words containing I, O, S, 2T and X

abstract␣expressionism Abstract␣Expressionismabstract␣expressionistaxiom␣of␣extensionalitychosen-plaintext␣attackcompetitive␣exclusionsconservative␣extensioncontrabass␣saxophonistcyclomaltodextrinasesdigital␣converter␣boxesdiketospirilloxanthindimethoxyamphetaminesexchanging␣of␣contractsexecutive␣ego␣functionsexploratory␣committeesexponential␣smoothingsextensional␣definitionexternopyramidisationextinction␣level␣eventsextraconstitutionallyextragastrointestinalextrapetiolar␣stipulesextraterritorialitiesfirst-chance␣exceptionsheterogeneous␣mixtureshexachloroantimonateshexafluoroantimonateshydroxycorticosteroidhydroxyethylrutosideshydroxymethylcytosineichthyoallyeinotoxisminternal␣carotid␣plexusisopropylthioxanthoneloncastuximab␣tesirineMaxwell␣Street␣Polishesmethoxycarbonylationsmethyltriethoxysilanemitochondrial␣matrixesmononeuritis␣multiplexoctamethyltrisiloxaneoperational␣exhaustionoxyfunctionalizationsphotodecarboxylationsright␣stochastic␣matrixRNA␣expression␣patternsRoss-Littlewood␣paradoxtakes␣it␣to␣the␣next␣levelthree␣marks␣of␣existenceto␣a␣first␣approximationtrihydroxycholesterolwhen␣one␣least␣expects␣itxenotransplantability

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 138 words
  • Spanish Wiktionary: 2 words
  • Italian Wiktionary: 1 word
  • German Wiktionary: 16 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 6 words

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