reenactor vs role player

reenactor and role player both are nouns.

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

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

Other hypernyms of reenactor include actor, histrion, player, thespian.

reenactor (noun)	role player (noun)
a person who enacts a role in an event that occurred earlier	a theatrical performer
	a person who makes deceitful pretenses