misbeliever vs heretic

misbeliever and heretic both are nouns.

Word	Noun	Adjective	Verb	Adverb
misbeliever	Yes	No	No	No
heretic	Yes	No	No	No

As nouns, misbeliever and heretic are synonyms defined as:

misbeliever and heretic: a person who holds religious beliefs in conflict with the dogma of the Roman Catholic Church

Other synonyms of misbeliever include religious outcast.

misbeliever (noun)	heretic (noun)
a person who holds religious beliefs in conflict with the dogma of the Roman Catholic Church	a person who holds religious beliefs in conflict with the dogma of the Roman Catholic Church
	a person who holds unorthodox opinions in any field (not merely religion)