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There are 743 twenty-one-letter words containing I, O, S and Y

(page 3)

gentiobiosyloleandringetting␣one's␣hands␣dirtygiving␣someone␣gray␣hairgiving␣someone␣grey␣hairglobotriaosylceramideglucosylcerebrosidaseglycerolphospholipidsglycerophosphocholineglycerophosphodiesterglycerophosphoric␣acidglycophosphoinositolsglycosphingolipidosisglycosylsphingolipidsgotten␣a␣word␣in␣edgewaysgravitational␣keyholesguaranteed␣equity␣bondsGuillain-Barré␣syndromegyroscopic␣stabilizersHashimoto's␣thyroiditishave␣one's␣wicked␣way␣withheads␣I␣win,␣tails␣you␣loseheliosynchronous␣orbithemilabyrinthectomieshemlock␣woolly␣adelgidshepatocystic␣triangleshepatonephric␣syndromeheterobasidiomycetousheteropolymerizationsheteropolysaccharideshexafluoroisobutylenehigh-fructose␣corn␣syrup high␣fructose␣corn␣syruphighly␣composite␣numberhighly␣sensitive␣personhigh-occupancy␣vehicles high␣occupancy␣vehicleshigh␣probability␣tradesHis␣Majesty's␣Oppositionhistomorphometricallyhistory␣of␣the␣four␣kingshitting␣on␣all␣cylindersholly-leaved␣barberrieshomogeneous␣polynomialhomogenous␣polynomialshow␣can␣you␣sleep␣at␣nighthow␣do␣you␣spell␣this␣wordhydrazinophthalazineshydrodesulphurisationhydrodesulphurizationhydrohemicryptophyteshydrophosphinylationshydrophosphonylationshydrostatic␣equilibriahydroureteronephrosishydroxyanthraquinoneshydroxycorticosteroidhydroxydeoxyguanosinehydroxyethylrutosideshydroxyisovaleric␣acidhydroxymethylcytosinehydroxyprostaglandinshyperbolic␣polynomialshyperbolic␣quaternionshypercholesterinaemiahypercholesterolaemiahypercholesterolaemichypercholesterolemiashypercholesterolemicshyperfibrinogenolysishyperhomocysteinaemiahyperhomocysteinemiashyperlipoproteinemiashyperparameterisationhyperphosphorylationshyperpolarizabilitieshypertestosteronaemiahypervascularizationshypoelliptic␣operatorshysterical␣historicalshysterosalpingographyichthyoallyeinotoxismichthyoplanktologistsidiopathic␣hypersomniaidiosyncratic␣reactionif␣you␣don't␣mind␣me␣sayingI␣have␣a␣bridge␣to␣sell␣youimmunocytofluorescentimmunohistochemicallyimmunohistomorphologyimmunopathophysiologyimmunophysiopathologyimprovisational␣comedyinclusion␣polymorphismin␣every␣sense␣of␣the␣wordinfraprezygapophysealinositolphosphoglycaninstantaneous␣velocityinstitute␣of␣technologyinterjurisdictionallyinterorganisationallyinterprezygapophysealintertransformabilityinterventionisticallyintraprezygapophysealinversely␣proportionalisopropylthioxanthoneisostoichiometricallyit's␣none␣of␣your␣businesskeeping␣one's␣eyes␣peeledKoolpinyah␣threadtailsKorsun-ShevchenkivskyiKoyraboro␣Senni␣SonghaiKyasanur␣forest␣diseaselabioglossopharyngealLanger-Giedion␣syndromelaryngobronchoscopieslemon-bellied␣flyrobinsleucoerythroblastosisleukoerythroblastosisLevy-Hollister␣syndrome

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See this list for:

  • Scrabble in English: no word
  • French Wiktionary: 490 words
  • Spanish Wiktionary: 1 word
  • Italian Wiktionary: no word
  • German Wiktionary: 55 words
  • Portuguese Wiktionary: no word
  • Dutch Wiktionary: 35 words

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