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There are 107 eighteen-letter words containing I, M, O, 2P and 2S

absorption␣spectrumad-hoc␣polymorphismsaminophospholipidsaminotripeptidasesamphisphaeriaceousapple␣dumpling␣shopsa␣promise␣is␣a␣promiseautolipophagosomesautomorphism␣groupsbiometric␣passportscephalaspidomorphscomparison␣shopperscomparison-shopping comparison␣shoppingcomposite␣particlesCoppersmith's␣attackCoppersmith's␣methodcylindrospermopsindomestic␣appliancesepitranscriptomicsEppstein's␣algorithmexpression␣templatehemispermatophoreshypercompensationshyperlymphocytosishypermetamorphosishypersomatotropismhypophosphataemiashypophosphatasemiahypsiprymnodontidsimmunosuppressantsimmunosuppressionsimmunosuppressivesimpersonal␣passivesJapanese␣persimmonslymphocytapheresismagnesium␣phosphatemapping␣class␣groupsmicrospectroscopesmicrospectroscopicmicrowhip␣scorpionsminisupercomputersmonophosphokinasesmonothiophosphatesmorphophonologistsmultiple␣expansionsmultispectroscopicOmphalos␣hypothesisOppression␣Olympicsoptical␣microscopespapillomatogenesisparasympatholyticsparish␣pump␣politicspathomorphogenesispeople's␣democraciespharmacotherapistsphilosophies␣of␣mindphosphoglucosaminephospholipomannansphosphometabolitesphosphoribomutasesphosphotransmitterphotomorphogenesisphotorespirometersphytomorphologistsphytophysiognomiespiss␣money␣up␣the␣wallplanning␣permissionpolitical␣spectrumspolysomnographistsporprismacovirusespost-impressionismspostimpressionistspotassium␣feldsparspreprofessionalismpreprosomatostatinpresenting␣problemspretermitted␣spouseprismatic␣compassesprisoner-of-war␣campsprotoplanetesimalspseudoimprovementspseudometaphysicalpseudopterostigmasput␣someone's␣pipe␣outpyrophosphoramidesrecess␣appointmentsresumptive␣pronounsresupplementationsSanfilippo␣syndromesemiphosphorescentsomatoparaphreniasspectromicroscopicspiroplectamminidsSportsman's␣ParadiseState␣of␣Mississippistriped␣swampdragonsubpostmastershipssupercompensationssuperimpregnationssuperminicomputerssupernova␣impostorssympathetic␣powderssymplectomorphismsthrombosuppressionthrombosuppressiveUpper␣Assam␣Division

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