heretic vs Ishmael

heretic and Ishmael both are nouns.

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

As nouns, Ishmael is a hypernym of heretic; that is, Ishmael 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
Ishmael: a person who is rejected (from society or home)

Other hypernyms of heretic include castaway, outcast, pariah.

heretic (noun)	Ishmael (noun)
a person who holds religious beliefs in conflict with the dogma of the Roman Catholic Church	(Old Testament) the son of Abraham who was cast out after the birth of Isaac; considered the forebear of 12 Arabian tribes
a person who holds unorthodox opinions in any field (not merely religion)	a person who is rejected (from society or home)