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There are 175 twenty-letter words containing I, O, 3R and U

airmass␣source␣regionsantiferroquadrupolarantiferroquadrupolesarctic␣ground␣squirrelarguing␣round␣and␣roundArgyll␣Robertson␣pupilaround␣Robin␣Hood's␣barnatmospheric␣pressuresauricularis␣posterioraurintricarboxylatesbrands␣from␣the␣burningBuchberger's␣algorithmcarcharodontosauriancarcharodontosauridscarcharodontosaurinecerebromicrovascularcerebroventricularlycervicothoracolumbarChirbury␣with␣Bromptoncholinergic␣urticariacircumhorizontal␣arcscomprador␣bourgeoisiecompression␣fracturescomputer␣architecturecomputer␣programmingscontravariant␣functorcorresponding␣authorscorrugator␣superciliicounterauthoritarian counter-authoritariancounterinterrogationcountermajoritarianscounterproliferationcounterrevolutionary counter-revolutionarycruising␣for␣a␣bruisingcryptopleurosperminecultural␣appropriatorcultural␣practitionercurrency␣interventionDarier-Roussy␣syndromedark␣crimson␣underwingde␣Bruijn-Erdős␣theoremdeciduous␣winterberryditetrafluoroboratesdrumhead␣court-martialendogenous␣retrovirusenteroneuroendocrineEurasian␣sparrowhawksEurasian␣tree␣sparrowsEuropean␣garden␣spiderEuropean␣herring␣gullsEuropean␣pond␣terrapinEuropean␣river␣lampreyfast␣Fourier␣transformferroelectric␣shutterfirst-person␣singularsGeiger-Müller␣countersgrouse␣whortleberrieshazard␣reduction␣burnsheterochromia␣iridiumheterokurtosis-robusthigher-order␣functionshumanitarian␣corridorhydraulic␣horsepowershydrostatic␣pressureshydroxystaurosporineI'm␣rubber␣and␣you're␣glueindustrial␣propertiesintegrating␣resourcesinteriorized␣stuttersintermolecular␣forcesinterrogative␣pronounintracerebrovascularintraocular␣pressuresIQs␣of␣room␣temperatureKaripúna␣Creole␣FrenchKirchhoff's␣current␣lawlinear␣algebraic␣groupLyme␣neuroborreliosismicroarchitecturallymicroautoradiographsmicroautoradiographymicrocircumferentialmicroentrepreneurialmicrofluorocytometermicrofracture␣surgerymicroultracentrifugemillimeters␣of␣mercurymillimetres␣of␣mercuryMissouri␣gooseberriesmultilayer␣perceptronmultiple␣transformersnephrocardiovascularnephroureterectomiesneurotranscriptionalnorthern␣house␣martinsnorthern␣palm␣squirrelobscurum␣per␣obscuriusorigamic␣architectureperpendicular␣pronounPierre␣Robin␣sequencesprecision␣agricultureprinted␣circuit␣boardsproducer␣price␣indexesprogressive␣bluegrassput␣the␣record␣straightput␣through␣the␣wringerquadratic␣reciprocityrecurrent␣slope␣lineaered␣herring␣prospectusrenormalization␣grouprequest␣for␣productionrequirements␣contractrequiring␣improvementretrotrapezoid␣nucleireturn␣demonstrationsrights␣of␣first␣refusalrose-coloured␣starlingrose-crowned␣fruit-doverunning␣roughshod␣overrusset␣ground␣squirrelSaint-Georges-sur-Loire

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