actress vs role player

actress and role player both are nouns.

Word	Noun	Adjective	Verb	Adverb
actress	Yes	No	No	No
role player	Yes	No	No	No

As nouns, role player is a hypernym of actress; that is, role player is a word with a broader meaning than actress:

Other hypernyms of actress include actor, histrion, player, thespian, adult female, woman.

actress (noun)	role player (noun)
a female actor	a theatrical performer
	a person who makes deceitful pretenses