heroine vs adult female

heroine and adult female both are nouns.

Word	Noun	Adjective	Verb	Adverb
heroine	Yes	No	No	No
adult female	Yes	No	No	No

As nouns, adult female is a hypernym of heroine; that is, adult female is a word with a broader meaning than heroine:

heroine: a woman possessing heroic qualities or a woman who has performed heroic deeds
adult female: an adult female person (as opposed to a man)

Other hypernyms of heroine include woman.

As nouns, adult female is a hypernym of heroine; that is, adult female is a word with a broader meaning than heroine:

Other hypernyms of heroine include character, part, persona, role, theatrical role, woman.

heroine (noun)	adult female (noun)
a woman possessing heroic qualities or a woman who has performed heroic deeds	an adult female person (as opposed to a man)
the main good female character in a work of fiction