histrion vs role player

histrion and role player both are nouns.

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

As nouns, histrion and role player are synonyms defined as:

Other synonyms of histrion include actor, player, thespian.

histrion (noun)	role player (noun)
a theatrical performer	a theatrical performer
	a person who makes deceitful pretenses