Baptisms rhymes with:
hypnotism's, anachronisms, antagonisms, aphorisms, capitalism's, communism's, criticisms, dualisms, embolisms, euphemisms, hypnotism's, journalism's, judaism's, liberalism's, mannerisms, mechanisms, metabolisms, methodisms, microorganisms, organism's, organisms, puritanisms
Baptisms sounds like:
batson's, biotechnica, biotechnica's, bitchiness, bodkins, botkins, budging, budzinski, budzynski