Synonyms of misbelieving

2 Syllables
miscreant, impious
3 Syllables
agnostic, skeptical, schismatic, dissenting, freethinking, disagreeing, sectarian, differing, atheistic, dissident, infidel
4 Syllables
heretical, dissentive, revisionist, heterodox, idolatrous, unbelieving, nonconformist, apostate
5 Syllables
iconoclastic