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There are 508 eighteen-letter words containing A, G, H, O and Y

(page 3)

nanochromatographynasopharyngoscopesneoglyphioceratidsneuroethologicallyneuroophthalmology neuro-ophthalmologyneuropathogenicityneurophysiologicalneuropsychologicalnoncholinergicallynonchronologicallynonexchangeabilitynon-Hodgkin␣lymphomanonhyperandrogenicnonlogarithmicallynonphosphorylatingnonphysiologicallynontopographicallynormophysiologicaloctaethyleneglycololigohymenophoreanoligohypomenorrheaoligoparaphenyleneophthalmologicallyophthalmopathologyopsonophagocytosedopsonophagocytosesopsonophagocytosisopsonophagocytoticorganoheterotrophyorthopantomographyorthotypographicaloscillographicallyoxydehydrogenationoxygen␣catastrophespaedopsychologicalpaedopsychologistspalaeoanthropology paoanthropologypalaeobiogeographypalaeogeochemistrypalaeohydrogeologypalaeohydrographicpalaeohydrologicalpalaeohydrologistspalaeophycologicalpaleogeomorphologypaleoichthyologistpaleophysiologicalpaleopsychologicalpalynostratigraphyparanasopharyngealpathenogeneticallypathophysiologicalpathophysiologistspathopsychologicalpatristic␣anthologyphantasmagoricallypharmacogenotypingpharmacophysiologypharmacotoxicologypharyngealizationspharyngobranchialspharyngoepiglotticpharyngoesophagealpharyngointestinalpharyngolaryngitespharyngolaryngitispharyngotonsilitisphenomenologicallyPhilippine␣mahoganyphotoallergenicityphotodegradabilityphotogalvanographyphotographic␣memoryphotophysiologicalphotoplethysmogramphototypographicalphylostratigraphicphysical␣geographerphysicotheologicalphysiogeographicalphysiopathogenesisphysiopathologicalphysiopathologistsphytohemagglutininphytohemaglutininephytomorphologicalphytopathogenicityphytopharmacologicphytophysiologicalphytotopographicalphytotoxicologicalplay␣one's␣cards␣rightplays␣one's␣hand␣rightplay␣the␣pronoun␣gameplay␣with␣edged␣toolsplethysmographicalpneumocolonographypolygon-circle␣graphpolypharmacologiespolyplethysmographpolysomnographicalpolysomnographistspolysporangiophyteprephosphorylatingprolymphangiogenicpromorphologicallyproselyte␣of␣the␣gateprosopographicallyprotopsychologicalpseudomythologicalpsychic␣photographypsychobiographicalpsychobiologicallypsychocosmologicalpsychodermatologicpsychogalvanometerpsychogalvanometrypsychogeographicalpsychogeriatricianpsychographologistpsycholinguisticalpsychological␣slipspsychologisticallypsychoneurologicalpsychopathologicalpsychopathologistspsychopathologizedpsychopathologizespsychopharmacologypsychosociologicalpsychotraumatologypterylographicallypupillographicallyPythagorean␣theoremPythagorean␣triplesQuiyoughcohannocksradiometallographyradiometeorographyrally␣around␣the␣flagrasterstereographyreality␣pornographyrenohistopathologyrhamnogalacturonylrhamnosylglucosiderhamnosylglycosiderheoplethysmographrhinolaryngoscopesroyal␣straight␣flushsaccopharyngiformssalpingopharyngealsalpingopharyngeus

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 296 words
  • Spanish Wiktionary: 3 words
  • Italian Wiktionary: no word
  • German Wiktionary: 14 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 14 words

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