heretic vs pariah

heretic and pariah both are nouns.

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

As nouns, pariah is a hypernym of heretic; that is, pariah is a word with a broader meaning than heretic:

heretic: a person who holds religious beliefs in conflict with the dogma of the Roman Catholic Church
pariah: a person who is rejected (from society or home)

Other hypernyms of heretic include castaway, Ishmael, outcast.

heretic (noun)	pariah (noun)
a person who holds religious beliefs in conflict with the dogma of the Roman Catholic Church	a person who is rejected (from society or home)
a person who holds unorthodox opinions in any field (not merely religion)