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There are 963 eighteen-letter words containing A, C, M, 2O and S

(page 6)

pharmacochaperonespharmacoeconomistspharmacoepigenomespharmacophenotypespharmacophysiologypharmacoproteomicsphonomicrosurgicalphosphoglucomutasephosphoglucosaminephosphometabolomicphosphorylceramidephotochemical␣smogsphotoconceptualismphotodocumentariesphotokeratectomiesphotomicrographersphotothermoplasticphylotranscriptomepick␣someone's␣brainsplastic␣deformationplatform␣screen␣doorpolitical␣commissarpolitical␣economiespolitical␣economistpolychemotherapiespolychromatophilespolygamma␣functionspolygamomonoeciouspolymolecularitiespolymorphonuclearspolypharmacologiespolysomnographicalpolyvictimizationspontomesencephalicpoor␣as␣a␣church␣mouseporprismacovirusespost␣mortem␣auctorispostmultiplicationpostpancreatectomypostpericardiotomypotassium␣ascorbatepotassium␣carbonatepotassium␣chromatespotassium␣gluconateprecompositionallyprecontemporaneousprime␣constellationprisoner-of-war␣campsprocedural␣memoriesprocessus␣mastoideiprochaetodermatidsprofessional␣victimprojection␣matricesproteoaminoglycanspseudocompensatorypseudoetymologicalpseudogynecomastiapseudoisochromaticpseudomultilocularpseudomythologicalpseudopolycythemiapseudorecombinantspseudosclerodermaspsychocosmologicalpsychodermatologicpsychogalvanometerpsychogalvanometrypsychomanipulationpsychopharmacologypsychosemioticallypsychosomatizationpsychostimulationspsychotraumatologypulmonary␣docimasiaquadragesimo-octavoquasimonochromaticquasimonoenergeticradiochromatogramsradiochromatoscansradiodensitometricradioracemizationsradiorespirometricradiospectrometersradiospectrometricradiosynovectomiesrandom-access␣memory random␣access␣memoryrattle␣someone's␣cagecamier's␣operationrechromatographiesreconfigurationismred-faced␣cormorantsretrotranscriptomerhabdomyosarcomatarhamnosylglucosiderhamnosylglycosiderheoencephalogramsRichardson's␣theoremRichmond␣upon␣ThamesRobinson␣arithmeticrubs␣someone's␣face␣insaccharometabolismsaccopharyngiformssalpingovariectomySanto␣Tomás␣OcotepecSao␣Tome␣and␣Principe São␣Tomé␣and␣Príncipesapromycetophagoussarcoendoplasmaticscapulocoracoideumscimitar-horned␣oryxsclerodermataceousscoped␣enumerationsScotch␣marine␣boilerscream␣bloody␣murdersecondary␣consumerssecondary␣emissionssecond-level␣domainssecond␣moment␣of␣areasecond␣order␣streamssedimentologicallysegmentation␣clocksseismocardiographyseismochronographssemantic␣borrowingssemiapologeticallysemi-boarding␣schoolsemisweet␣chocolatesend␣someone␣packingsent␣someone␣packingsergeant␣major␣loachserve␣someone␣a␣tricksialoadenectomizedsialoglycopolymerssialoglycoproteomesialotranscriptomesialylglycopolymersocial␣commentariessocial␣conservatismsocial␣evolutionismsociocommunicativesociodemographicalsocioenvironmentalsociomaterialitiessociopragmatically

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