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There are 675 eighteen-letter words containing E, H, I, O, R, T and Y

(page 4)

once␣burned,␣twice␣shyon-the-fly␣encryptionovariohysterectomyoxydehydrogenationPaal-Knorr␣synthesispalaeobiochemistrypalaeogeochemistrypalaeohydrologistspanhypoproteinemiapanhypoproteinemicpapilioerythrinoneparathyroid␣hormoneparthenocarpicallypellitory␣of␣the␣wallpersonality␣clashesperturbation␣theoryphanerocrystallinepharmacogenotypingpharmacoresistancypharyngealizationspharyngoepiglotticpharyngointestinalpharyngolaryngitesphiloprogenitivelyphosphatidylserinephosphoribosylatedphosphorocyanidatephosphorylcreatinephotoallergenicityphotodegradabilityphotographic␣memoryphotoimmunotherapyphotopolymerizablephotoreversibilityphycoerythrobilinsphycoerythrocyaninphylobetadiversityphylotranscriptomephysiobiochemistryphytotherapeuticalplastohydroquinoneplay␣one's␣cards␣rightplays␣one's␣hand␣rightplay␣well␣with␣othersplethysmographicalpolitical␣machinerypolychemotherapiespolychromatophilespolyendocrinopathypolypharmaceuticalpolysporangiophyteporphyrinogenicityportal␣hypertensionpotassium␣hydroxideprephosphorylatingprephosphorylationpresynchronizationprimary␣hypothermiaprinciple␣of␣charityproofs␣by␣exhaustionprosecution␣historyprosperity␣theologyprotoanthophylliteprotoporphyrinogenpseudoheritabilitypseudohypertensionpseudohypertrophicpseudohyponatremiapsychodermatologicpsychogeriatricianpsychoneurologistspsychoneuroticallypsychopharmaceuticpsychotherapeuticspsychotherapeutistpsychrometric␣chartpsychrosensitivitypterylographicallypyelonephritogenicpyrheliometricallyPythagorean␣triplesquantum␣field␣theoryquasithermodynamicradiation␣chemistryradiculomyelopathyradiculoneuropathyradiculoplexopathyradioimmunotherapyradiometallographyradiometeorographyrank-nullity␣theoremreality␣pornographyRed␣Queen␣hypothesisrenohistopathologyrepeated␣bodily␣harmrephosphorylationsresynchronisationsresynchronizationsreticulated␣pythonsretinohypothalamicretinovasculopathyretrophylogenomicsretrosyntheticallyrides␣the␣cotton␣ponyscheduled␣territorySchnitzler␣syndromescimitar-horned␣oryxSiberian␣rubythroatsignature␣authoritysling␣psychrometerssodium␣hypochloritesouthern␣yellow␣pinespectrographicallyspectroheliographyspirocycloheptanesspondylarthritidesspondylotherapistsstakeholder␣societysteganographicallystephanoberyciformsticky␣shed␣syndromestoichiometricallystorage␣hypervisorsstrontiopyrochloreSt␣Totteringham's␣Daystyrylisothiazolessuperoleophobicitysuperphenomenalitysuperstoichiometrysympathetic␣powderssympathoadrenergicsympathoexcitatorysymplectomorphismstautomorphemicallyTaylor-White␣processtelautographicallytelephone␣directorytephrostratigraphytertiary␣phosphinestetraethylammoniumtetrahexylammoniumtetrahydridoboratetetrahydrochloridetetrahydrocortisoltetrahydropyridinetetrahydrotriazinetetraiodothyroninetetramethyluronium

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 639 words
  • Spanish Wiktionary: no word
  • Italian Wiktionary: no word
  • German Wiktionary: 59 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 16 words

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