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There are 828 eighteen-letter words containing 2O, P, R and 2S

(page 5)

pseudorecombinantspseudoreplicationspseudorthoceratidspseudo-scholarshipspseudosclerodermaspseudotrajectoriespseudotransductionpseudotrichonotidspseudotuberculosispseudouridylationspseudoxyrhophiinespseudozygopleuridspsychographologistpsychohistoricallypsychoneurologistspulling␣in␣one's␣hornspulmonary␣embolismspurple␣loosestrifespustulocrustaceousput␣hair␣on␣one's␣chestput␣out␣of␣one's␣miserypyrophosphokinasespyrophosphoramidespyrophosphorolysispyrophosphorylasespyrophosphorylysespyrophosphorylysispyropoikilocytosisqueer␣someone's␣pitchraces␣out␣of␣the␣trapsradiospectrometersreaping␣what␣one␣sowsrectosigmoidoscopyrehospitalisationsrehospitalizationsrepersonalizationsrephosphorylationsreprofessionalizedreprofessionalizesrequest␣for␣proposalresearch␣professorsrespecter␣of␣personsrespondeat␣superiorresponsibilisationresponsibilizationresumptive␣pronounsretrospectroscopesretrotranspositionrevising␣one's␣priorsrhinolaryngoscopesrhinoseptoplastiesrolls␣up␣one's␣sleevesrose-colored␣pastorsrose-coloured␣pastorRusso-European␣Laikasaccopharyngiformssalpingooophoritis salpingo-oophoritisSanfilippo␣syndromesapromycetophagoussarcoendoplasmaticscansoriopterigidsscansoriopterygidsscissors␣paper␣stonescoped␣enumerationsscrew␣up␣one's␣couragesculptured␣tortoiseseafloor␣spreadingsseasonal␣depressionsecondary␣phosphinesecond-person␣pluralseismocardiographyseismochronographsself-preoccupationssemiphosphorescentsemiprofessionallyseparation␣constantseparation␣of␣dutiesseparation␣of␣powersseptorhinoplastiesset␣up␣someone's␣birseShakespearologistssheltered␣workshopsshort-tailed␣parrotsshotgun␣microphonesshoving␣it␣up␣your␣asssialoglycopolymerssialoglycoproteasesialoglycoproteinssialotranscriptomeskotomorphogenesisslaps␣someone␣aroundsmoke-colored␣peweessolenofilomorphidssole␣proprietorshipsolubility␣productssomatomammotropinssomatoparaphreniassomeone's␣jaw␣droppedsong␣and␣supper␣roomssonosalpingographysonospectrographicsopranino␣recorderssopranino␣saxophonesoprano␣saxophonistsoprillo␣saxophonessourtop␣blueberriesSoutheastern␣Europespecial␣prosecutorsspecial␣resolutionsspectroastrometricspectrogoniometersspectroheliographsspectrohelioscopesspectrohelioscopicspectromicroscopicspectrophotographsspectrophotometersspectropolariscopespectroradiometersspermatoproteasomespheres␣of␣knowledgespherostomatocytesspirits␣of␣hartshornspirocycloheptanesspirocyclopentanesspirocyclopropanesspiroketalizationssplit-ring␣resonatorspoil␣someone␣rottenspondylotherapistsspongiotrophoblastspurious␣diphthongsspurious␣infectionsstand␣upon␣one's␣termsstereofluoroscopicstereotypographersSterling␣professorsstools␣of␣repentancestorage␣hypervisorsstraight␣apostrophesubcontemporaneous

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