Monotheism rhymes with:
mccarthyism, polytheism, mccarthyism, polytheism, 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, multiculturalism, multilateralism, nazism, nestorianism, parliamentarianism, pietism, polymorphism, polytheism, pugilism, realism, sadism, sexism, surrealism, taoism, theism, truism, vandalism, vegetarianism, vigilantism, voyeurism
Monotheism sounds like:
maddison, madigan, madison, madsen, madson, mandujano, matheson, mathewson, mathiasen, mathiason, mathiesen, mathieson, mathisen, mathison, matkin, matsen, matson, matteson, matthausen, matthewson, matthiesen, mattison, mattson, matzen, medchem, medecin, medicine, mendicino, mendocino, metcom, methazine, methodism, midcon, midseason, midsession, mitcham, mitchem, mitchen, mitchum, modicum, modugno, mohtashemi, mondschein, montagna, montagne, montagnino, montedison, montejano, montesano, montesino, montezuma, mudwagon, mutagen, mutzman