Mannerisms rhymes with:
aphorisms, anachronisms, antagonisms, aphorisms, baptisms, capitalism's, communism's, criticisms, dualisms, embolisms, euphemisms, hypnotism's, journalism's, judaism's, liberalism's, mechanisms, metabolisms, methodisms, microorganisms, organism's, organisms, puritanisms
Mannerisms sounds like:
marchenko, marching, marchinko, marchioness, marcinek, marciniak, marcinko, marcinkowski, marcinkus, margining, margins, markham's, marking, markings, markunas, memorizing, merging, morgan's, morgans, moroccans, morricone's, morrison's, mrozinski