role vs heroine

role and heroine both are nouns.

Word	Noun	Adjective	Verb	Adverb
role	Yes	No	No	No
heroine	Yes	No	No	No

As nouns, heroine is a hyponym of role; that is, heroine is a word with a more specific, narrower meaning than role:

Other hyponyms of role include bit part, minor role, heavy, hero, ingenue, name part, title role, baddie, villain.

role (noun)	heroine (noun)
the actions and activities assigned to or required or expected of a person or group	a woman possessing heroic qualities or a woman who has performed heroic deeds
normal or customary activity of a person in a particular social setting	the main good female character in a work of fiction
what something is used for
an actor's portrayal of someone in a play