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There are 800 eighteen-letter words containing H, I, N, O, P, R and T

(page 5)

plainclothespersonplastohydroquinoneplatinichloric␣acidplatinochloric␣acidplay␣one's␣cards␣rightplays␣one's␣hand␣rightpneumotherapeuticspockethandkerchief pocket-handkerchief pocket␣handkerchiefPointe␣Coupee␣Parishpolished␣one's␣rocketpolishes␣one's␣rocketpolitical␣machinerypolyendocrinopathypolysomnographistspolysporangiophyteporphyrinogenicityportal␣hypertensionposition␣of␣strengthpostbronchodilatorpostrehabilitationprecatheterizationprehospitalizationprephosphorylatingprephosphorylationpresynchronizationprime␣number␣theoremprinciple␣of␣charityprinter's␣apostropheproofs␣by␣exhaustionprosecution␣historyprotease␣inhibitorsproteocephalideansprotoanthophylliteprotomitochondrialprotomitochondrionprotoporphyrinogenpseudohypertensionpseudohyponatremiapseudotrichonotidspsychogeriatricianpsychoneurologistspsychoneuroticallypsychrosensitivitypteromerhanophobiaptilochronologicalpuff␣the␣magic␣dragonpull␣down␣the␣curtainpurulent␣bronchitisput␣hair␣on␣one's␣chestpyelonephritogenicpyranoanthocyaninsPythagorean␣triplesqueer␣someone's␣pitchRabin-Karp␣algorithmradiation␣lampshaderadiculoneuropathyradiocinematographradioimmunotherapyRavensthorpe␣radishreality␣pornographyrealphabetizationsreaping␣what␣one␣sowsrechromatographingRed␣Queen␣hypothesisrehospitalisationsrehospitalizationsrenohistopathologyrephosphorylationsRepublic␣of␣the␣CongoRepublic␣of␣the␣Sudanreticulated␣pythonsretinohypothalamicretinovasculopathyretrophylogenomicsrhinoseptoplastiesrhizocompartmentalRichmond␣upon␣Thamesrides␣the␣cotton␣ponyrode␣with␣the␣punchesroentgenotherapistroll␣with␣the␣punchesromantic␣friendshipround-lobed␣hepaticasalpingooophoritis salpingo-oophoritisscleractiniamorphssemiphosphorescentseptorhinoplastiesshipping␣containersshooting␣from␣the␣hipshooting␣from␣the␣lipshotgun␣microphonesshoving␣it␣up␣your␣asssince␣Hector␣was␣a␣pupskotomorphogenesisslapping␣on␣the␣wristsling␣psychrometerssocial␣anthropologysocial␣partnershipssomatoparaphreniassonospectrographicsoprano␣saxophonistsouthern␣hemisphere Southern␣Hemispheresouthern␣yellow␣pinespanners␣in␣the␣workssphaerobertranditespirits␣of␣hartshornspirocycloheptanesspondylarthritidesspondylotherapistsspongiotrophoblastspot␣the␣differencesspurious␣diphthongssteganographicallystephanoberyciformstephanofilariasisstopping␣the␣pressesstrontiopyrochloresubstitution␣ciphersulphochlorinationsupergiant␣amphipodsuperphenomenalitysupertechnological super-technologicalsympathoadrenergicsympathochromaffinsympathoinhibitorssympathoinhibitorysynchiotrophoblastsynctiotrophoblasttechnoprogressivestelephone␣directorytephrochronologisttertiary␣phosphinestetrahydropyridinetheophilanthropismtheophilanthropist

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