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There are 771 eighteen-letter words containing A, C, M, O and Y

(page 5)

phytopharmacologicpicocyanobacteriumplethysmographicalpneumocolonographypolitical␣machinerypolychemotherapiespolychromatophilespolychromatophiliapolychromatophilicpolygamma␣functionspolygamomonoeciouspolymethylacrylate polymethyl␣acrylatepolymicrobacterialpolymolecularitiespolymorphocellularpolymorphonuclearspolymorphonucleatepolynomial␣functionpolypharmaceuticalpolypharmacologiespolysomnographicalpolyvictimizationspostpancreatectomypostpericardiotomypotentiometricallyPottawatomie␣Countyprecompositionallypresymptomaticallyprocardiomyopathicproducer-only␣marketprolymphangiogenicpromorphologicallyprotected␣democracyproteoaminoglycanspseudocompensatorypseudoetymologicalpseudogynecomastiapseudometaphysicalpseudomythologicalpseudopolycythemiapsychocosmologicalpsychodermatologicpsychodramaticallypsychogalvanometerpsychogalvanometrypsychomanipulationpsychomanipulativepsychopharmaceuticpsychopharmacologypsychosemanticallypsychosemioticallypsychosomatizationpsychostimulationspsychotraumatologypsychrometric␣chartpulmonary␣docimasiapyrheliometricallypyroelectrodynamicquasithermodynamicquaternary␣compoundradiation␣chemistryradiculomyelopathyradiosynovectomiesrandom-access␣memory random␣access␣memoryreflectometricallyrefractometricallyretinohypothalamicrhabdomyosarcomatarhamnogalacturonylrhamnosylglucosiderhamnosylglycosideribopuromycylationRocky␣Mountain␣feversaccopharyngiformssalpingovariectomySandmeyer␣reactionssapromycetophagousscimitar-horned␣oryxscream␣bloody␣murdersecondary␣consumerssecondary␣emissionssedimentologicallyseismocardiographysemiapologeticallysemibiographicallysemiconservativelysialoglycopolymerssialoglycoproteomesialylglycopolymersialyllactosaminessmokestack␣industrysociopragmaticallysomnambulisticallyspectropolarimetryspherostomatocytesstanding␣on␣ceremonystephanoberyciformstereoisomericallystoichiometricallysubcompositionallysublogarithmicallysubmicroscopicallysuffer␣by␣comparisonsummary␣proceedingssurface␣etymologiessycamore␣maple␣treessympatheticolyticssympathetic␣powderssympathicomimeticssympathoactivationsympathoadrenergicsympathochromaffinsympathoexcitationsympathoexcitatorysymphony␣orchestrassyncategorematicalsyntacticosemantictaken␣someone's␣fancytakes␣someone's␣fancytautomorphemicallytemporozygomaticaltetraazamacrocycletetranary␣compoundsthermoacoustimetrythermoanalyticallythermodynamic␣statethermoelectricallythermohydrodynamicthermomechanicallythermomechanometrythermophoreticallythrombocytopaeniasthrombocytopathiestitan␣primary␣schoolTouchard␣polynomialto␣whom␣it␣may␣concerntoxicopharmacologytrack␣and␣bowl␣systemtranscarbamoylasestranscarbamylationtranscriptomicallytrihexosylceramidetwo␣can␣play␣that␣gametwo␣can␣play␣this␣gameultrabiomicroscopyultracryomicrotomeultracryomicrotomy

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 257 words
  • Spanish Wiktionary: 4 words
  • Italian Wiktionary: no word
  • German Wiktionary: 22 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 13 words

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