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There are 626 eighteen-letter words containing E, H, P, R, T and Y

(page 4)

political␣machinerypolychemotherapiespolychromatophilespolyendocrinopathypolyesterurethanespolyethercarbonatepolyethersulphonespolymethylacrylate polymethyl␣acrylatepolymorphonucleatepolypharmaceuticalpolyphosphorylatedpolyplethysmographpolysporangiophyteporphyrinogenicityportal␣hypertensionpotassium␣hydroxidepreanaestheticallyprephosphorylatingprephosphorylationpresynchronizationpretherapeuticallypretty␣horsebreakerprimary␣hypothermiaprinciple␣of␣charityproofs␣by␣exhaustionprosecution␣historyproselyte␣of␣the␣gateprosperity␣theologyprotoanthophylliteprotoporphyrinogenpseudoheritabilitypseudoheterozygouspseudohypertensionpseudohypertrophicpseudohyponatremiapseudophylactocarppsychodermatologicpsychogalvanometerpsychogalvanometrypsychogeriatricianpsychoneurologistspsychoneuroticallypsychopharmaceuticpsychotherapeuticspsychotherapeutistpsychrometric␣chartpsychrosensitivitypterylographicallypyelonephritogenicpyrheliometricallypyrophosphorylatedPythagorean␣theoremPythagorean␣triplesradiculomyelopathyradiculoneuropathyradiculoplexopathyradioimmunotherapyradiometallographyradiometeorographyrasterstereographyreality␣pornographyRed␣Queen␣hypothesisrenohistopathologyrepeated␣bodily␣harmrephosphorylationsreticulated␣pythonsretinohypothalamicretinovasculopathyretrophylogenomicsrheoplethysmographrides␣the␣cotton␣ponysandplay␣therapistssapromycetophagoussling␣psychrometerssodium␣hypochloritesouthern␣yellow␣pinespectrographicallyspectroheliographyspectromorphometryspectrophotographyspherostomatocytesspirocycloheptanesspondylarthritidesspondylotherapistsspotted␣flycatcherssteganographicallystephanoberyciformstereotypographersstorage␣hypervisorsstrontiopyrochloresubtherapeuticallysuperheavy␣elementssuper-heavy␣frigatessuperoleophobicitysuperphenomenalitysuperstoichiometrysympathetic␣powderssympathetic␣stringssympathoadrenergicsympathoexcitatorysymphony␣orchestrassymplectomorphismstautomorphemicallyTaylor-White␣processtelautographicallytelecobaltotherapytelephone␣directorytephrostratigraphytertiary␣phosphinestetrahydropyridinetetrahydropyrrolestetraphenylboratestheoretical␣physicsthermokeratoplastythermophoreticallythermophysiologiesthermoradiotherapythermoresponsivitythiophosphorylatedthiopyrophosphatesthorn-apple␣crystalsthoughts␣and␣prayersthrombelastographythrombocytopaeniasthrombocytopathiesthrombocytopoiesisthrombocytopoieticthromboprophylaxesthyrotropic␣hormonetight␣pants␣syndrometonsillopharyngealtransphenomenalitytransphosphorylasetransphosphorylatetrash␣heap␣of␣historytrialkylphosphinestrichlorobiphenylstrichlorodiphenylstricresyl␣phosphatetrimethylolpropanetrimethylphosphinetrimethylpyridinestriphenylaluminiumtriphenylethylenestriphenylmethyliumtriphenylphosphanetriphenylphosphatetriphenylphosphinetrivinylphosphines

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 674 words
  • Spanish Wiktionary: no word
  • Italian Wiktionary: no word
  • German Wiktionary: 63 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 17 words

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