Synonyms of disbeliever

2 Syllables
flouters, sneerers, skeptic, atheist, mockers, heathen, scoffer, sneerer, pagan, doubter, cynic, doubters
3 Syllables
agnostic, zetetic, satirist, profaner, questioner, dissenter, heretic, freethinker, infidel, nihilist, pessimist
4 Syllables
misanthropist, unbeliever, misbeliever, misanthrope, misogamist, unbelievers, materialist, rationalist, apostate