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There are 92 eighteen-letter words containing 2O, P, R, T and X

Alexandrov␣topologyantibioprophylaxisbaritone␣saxophonesbijoux␣problemettesbisperoxovanadatesbootstrap␣paradoxesbox␣and␣whisker␣plotsbox␣and␣whiskers␣plotBurali-Forti␣paradoxcamphocarboxylatescarboxyprothrombincofactor␣expansionsconjugate␣redox␣paircontrol␣experimentscoordinated␣complexcopy-on-write␣proxiescorporate␣executivecounterexplanationcounterexpositionsdeacetoxyscirpenoldeoxytylophorininedextropropoxyphenediacetoxyscirpenolejaculation␣praecoxelectroaxonographyexcavator␣operatorsexoatmosphericallyexophthalmic␣goiterexophthalmic␣goitreexplanatory␣fictionexponential␣growthsextemporaneousnessextracomputationalextracorporealizedextrahematopoieticextramorphologicalextraphilosophicalextraphysiologicalex-tropical␣cycloneshematopneumothoraxheterocomplexationhexaphosphorylatedhydroperoxidationshydroperoxylationshydrophenoxylationhydrostatic␣paradoxhydroxymaprotilinehydroxyphosphonatehydroxytryptophansinferiority␣complexmethoxytryptophansnanohydroxyapatiteneurosporaxanthineneurotoxoplasmosisnicotine␣polacrilexoportuzumab␣monatoxout-of-box␣experienceoverapproximations over-approximationsoverextrapolationsoxygen␣catastrophesparadoxes␣of␣fictionpentacarbon␣dioxidepentaformylgitoxinperfluorohexanoateperoxodiphosphatesperoxomonosulfatespharmacotoxicologyphotoperoxidationspinxterbloom␣azaleapolycontexturalitypolypseudorotaxanepotassium␣hydroxidepredecarboxylationproofs␣by␣exhaustionprototype␣extensionproximoposteriorlypseudoexacerbationradiculoplexopathyreprotoxicologicalsexual␣reproductionsoprano␣saxophonistsuperiority␣complexsympathoexcitatorythromboprophylaxesthromboprophylaxistoxicopharmacologyunderapproximation under-approximationunderexploitationsunderextrapolationxerothermic␣periods

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 59 words
  • Spanish Wiktionary: 4 words
  • Italian Wiktionary: no word
  • German Wiktionary: 13 words
  • Portuguese Wiktionary: 2 words
  • Dutch Wiktionary: 8 words

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