Sadism rhymes with:
buddhism, absenteeism, amateurism, anthropomorphism, antidisestablishmentarianism, atavism, baptism, buddhism, careerism, cubism, culturalism, defeatism, deism, dimorphism, dwarfism, ethnocentrism, extremism, idealism, irredentism, isomorphism, jainism, jingoism, marxism, masochism, mccarthyism, modalism, monism, monotheism, multiculturalism, multilateralism, nazism, nestorianism, parliamentarianism, pietism, polymorphism, polytheism, pugilism, realism, sexism, surrealism, taoism, theism, truism, vandalism, vegetarianism, vigilantism, voyeurism
Sadism sounds like:
saskatchewan, schatzman, schutzman, scotsman, seedsman, shatkin, shotgun, sietsema, sitcom, sitzman, sitzmann, sodecom, stasney, stasny, stassen, statesman, statesmen, statism, steckman, stegeman, stegemann, stegman, stegmann, steichen, stetson, stickney, stigma, stjohn, stockham, stockhausen, stockman, stocum, stoicism, stuckman, stutesman, stutsman, stutzman, stygian, st_jean, st_john, sytsma