religious outcast vs Ishmael

religious outcast and Ishmael both are nouns.

Word	Noun	Adjective	Verb	Adverb
religious outcast	Yes	No	No	No
Ishmael	Yes	No	No	No

As nouns, Ishmael is a hypernym of religious outcast; that is, Ishmael is a word with a broader meaning than religious outcast:

religious outcast: 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 religious outcast include castaway, outcast, pariah.

religious outcast (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 is rejected (from society or home)