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There are 62 eighteen-letter words containing 3I, R and X

administratrixshipaluminium␣hydroxideantibioprophylaxisantiochratoxigenicauxiliary␣power␣unitbisdioxopiperazinebishydroxamic␣acidscanaridigitoxosidecarboxypenicillinscardiocytotoxicitycigar␣box␣guitaristsdecaoxotrisilicatedeoxyribothymidinedeoxyuridylic␣acidsdichlorine␣hexoxidedichlorine␣monoxidedihydroxyacridinesdihydroxyaluminiumdihydroxypteridinedinitrogen␣monoxidedinitrogen␣trioxidedioxygen␣difluoridedirect␣examinationselectroauxiliariesenterotoxigenicityexcitation␣energiesexecutive␣privilegeexercise␣in␣futilityexterior␣derivativeexterritorializingextrainstitutionalfive-finger␣exercise five␣finger␣exercisegiant␣radio␣galaxieshydroxypiperidineshydroxypyrimidineshydroxysuccinimidehyperextensibilityinferiority␣complexintersexualizationIrving␣the␣Explainerlibertarian␣Marxismlibertarian␣Marxistmitochondriotoxinsnicotine␣polacrilexoligooxopiperazineoverexcitabilitiesoverlexicalizationoxidation-reductionpanexperientialismpanexperientialistpaperclip␣maximizerproximate␣principlepyridylsulfoximineradiotoxicologicalred-billed␣leiothrixthiocarboxylic␣acidtransition␣matrixestricarboxylic␣acidstrimedoxime␣bromidevulnerability␣indexwater␣intoxications

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 190 words
  • Spanish Wiktionary: 2 words
  • Italian Wiktionary: no word
  • German Wiktionary: 32 words
  • Portuguese Wiktionary: 3 words
  • Dutch Wiktionary: 4 words

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