Isms rhymes with:
prisms, schisms, anachronisms, antagonisms, aphorisms, baptisms, capitalism's, communism's, criticisms, dualisms, embolisms, enthusiasms, euphemisms, hypnotism's, journalism's, judaism's, liberalism's, mannerisms, mechanisms, metabolisms, methodisms, microorganisms, monisms, organism's, organisms, orgasms, prisms, puritanisms, schisms, spasms, surrealism's, surrealisms
Isms sounds like:
icahn's, icing, icons, ignace, ignacio, ignacio's, ignasiak, igneous, ignominious, iguanas, ijames, isensee, isogenic, issing, issuance, issuances, issuing, izansky, izansky's