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There are 795 eighteen-letter words containing E, H, N, O, R and Y

(page 5)

phosphatidylserinephosphonoglycerolsphosphonopyruvatesphosphorocyanidatephosphorylcholinesphosphorylcreatinephotoallergenicityphotoimmunotherapyphycoerythrobilinsphycoerythrocyaninphylotranscriptomeplastohydroquinoneplay␣one's␣cards␣rightplays␣one's␣hand␣rightplay␣the␣pronoun␣gamepneumocolonographypolitical␣machinerypolychlorobiphenylpolyendocrinopathypolyesterurethanespolyethercarbonatepolyethersulphonespolygon-circle␣graphpolyhydroxyphenolspolymorphonuclearspolymorphonucleatepolysporangiophytepolyvinylchlorides polyvinyl␣chloridespops␣someone's␣cherryporphyrinogenicityportal␣hypertensionpour␣honey␣in␣one's␣earprephosphorylatingprephosphorylationpresynchronizationprinciple␣of␣charityprolymphangiogenicproofs␣by␣exhaustionprosecution␣historyprotoanthophylliteprotoporphyrinogenpseudohypertensionpseudohyponatremiapseudoxyrhophiinespsychogalvanometerpsychogalvanometrypsychogeriatricianpsychoneurologicalpsychoneurologistspsychoneuroticallypsychrosensitivitypulmonary␣emphysemapunch␣drunk␣syndromepyelonephritogenicpyrophosphokinasespyrrolidinophenonePythagorean␣theoremPythagorean␣triplesquantum␣field␣theoryquasithermodynamicradiation␣chemistryradiculoneuropathyradioimmunotherapyrally␣around␣the␣flagRamsay␣Hunt␣syndromerank-nullity␣theoremRaynaud's␣phenomenonreality␣pornographyRed␣Queen␣hypothesisrenohistopathologyrephosphorylationsresynchronisationsresynchronizationsreticulated␣pythonsretinohypothalamicretinovasculopathyretrophylogenomicsretrosyntheticallyrhamnosylglucosiderhamnosylglycosiderhinolaryngoscopesrides␣the␣cotton␣ponyRydberg's␣goldenbushRyther␣cum␣OssendykeSabbath-day's␣journeysalpingopharyngealsalpingopharyngeusSchnitzler␣syndromescimitar-horned␣oryxsecondary␣phosphinesee␣you␣next␣Thursdayshaken␣baby␣syndromeSiberian␣rubythroatsignature␣authoritysling␣psychrometerssouthern␣yellow␣pinespirocycloheptanesspondylarthritidesspondyloperipheralspondylotherapistssteganographicallystephanoberyciformsticky␣shed␣syndromeStockholm␣syndromedstrontiopyrochloreSt␣Totteringham's␣Daysulfonic␣anhydridessulfonylhydrazonessulphonic␣anhydridesulphonylhydrazonesuperphenomenalitysympathoadrenergicsymphony␣orchestrassynchronized␣clockssynchronized␣diverssynchronized␣divingsyringohydromyeliatechnology␣transfertelephone␣directorytertiary␣phosphinestetrabromoethylenetetrachlorethylenetetracyanoethylenetetraethylammoniumtetrahexylammoniumtetrahydropyridinetetrahydrotriazinetetraiodothyroninetetramethyluroniumtetraphenylboratestheory␣of␣everythingthermoanalyticallythermoconductivitythermodynamic␣statethermohydrodynamicthermoinducibilitythermomagnetometrythermomechanicallythermomechanometrythermoresponsivitythorn-apple␣crystalsThorne-Zytkow␣object Thorneytkow␣object

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 691 words
  • Spanish Wiktionary: 3 words
  • Italian Wiktionary: no word
  • German Wiktionary: 80 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 24 words

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