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There are 789 eighteen-letter words containing A, H, M and Y

(page 5)

phenylcarbodiimidephenyldiazomethanephenylethanolaminepheochromocytomataPhilippine␣mahoganyphosphorylceramidephotobiomodulatoryphotographic␣memoryphotoimmunotherapyphotoplethysmogramphotopolymerizablephyletic␣gradualismphylotranscriptomephysicochemicalismphysicomathematicsphytohemagglutininphytohemaglutininephytomorphologicalphytopharmacologicphytoplankton␣bloompiss␣money␣up␣the␣wallplay␣the␣pronoun␣gameplay␣with␣house␣moneyplethysmographicalpneumocolonographypolitical␣machinerypolychemotherapiespolychromatophilespolychromatophiliapolychromatophilicpolydolopimorphianpolymethoxyflavonepolymethylacrylate polymethyl␣acrylatepolymorphocellularpolymorphonuclearspolymorphonucleatepolypharmaceuticalpolypharmacologiespolyplethysmographpolysomnographicalpolysomnographistspotassium␣hydroxideprimary␣hypothermiaprocardiomyopathicprolymphangiogenicpromorphologicallypseudohyperkalemiapseudohyponatremiapseudomerohedrallypseudometallophytepseudometaphysicalpseudomythologicalpseudoparaphylliumpseudopolycythemiapsychocosmologicalpsychodermatologicpsychodramaticallypsychogalvanometerpsychogalvanometrypsychomanipulationpsychomanipulativepsychopharmaceuticpsychopharmacologypsychosemanticallypsychosemioticallypsychosomatizationpsychostimulationspsychotraumatologypsychrometric␣chartpulmonary␣emphysemapyrheliometricallypyrophosphoramidesPythagorean␣theoremquantum␣field␣theoryquasithermodynamicradiation␣chemistryradiculomyelopathyradioimmunotherapyradiometallographyradiometeorographyRamsay␣Hunt␣syndromerank-nullity␣theoremRaynaud's␣phenomenonrepeated␣bodily␣harmretinohypothalamicrhabdomyosarcomatarhamnogalacturonylrhamnosylglucosiderhamnosylglycosiderheoplethysmographrhythmic␣gymnasticsright␣lymphatic␣ductrunning␣in␣the␣familysaccopharyngiformssapromycetophagousscimitar-horned␣oryxSedgehill␣and␣Semleyseismocardiographysemibiographicallyshaken␣baby␣syndromespherostomatocytessplenohepatomegalyspondylomyelopathysqueaky␣wheel␣systemSteeple␣with␣TynehamstephanoberyciformstoichiometricallySt␣Totteringham's␣Daystylohyoid␣ligamentsublogarithmicallysummability␣methodssuperheavy␣elementssupernumeraryshipssuperphenomenalitysympatheticolyticssympathetic␣powderssympathetic␣stringssympathicomimeticssympathoactivationsympathoadrenergicsympathochromaffinsympathoexcitationsympathoexcitatorysympathoinhibitionsympathoinhibitorssympathoinhibitorysymphony␣orchestrassyringohydromyeliasystem␣architecturetautomorphemicallytelehydrobarometertetrabromoethylenetetraethylammoniumtetrahexylammoniumtetramethylbenzenetetramethylmethanetetramethylsilanestetramethylthiuramtetramethyluroniumtetrathiomolybdatethat␣way␣madness␣liesthaumatopsyllioidsthermoacoustimetrythermoanalyticallythermodynamic␣statethermoelectricallythermohydrodynamicthermokeratoplasty

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 429 words
  • Spanish Wiktionary: 1 word
  • Italian Wiktionary: no word
  • German Wiktionary: 80 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 22 words

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