Konstantin Stanislavsky vs role player

Konstantin Stanislavsky and role player both are nouns.

Word	Noun	Adjective	Verb	Adverb
Konstantin Stanislavsky	Yes	No	No	No
role player	Yes	No	No	No

Konstantin Stanislavsky (noun)	role player (noun)
Russian actor and theater director who trained his actors to emphasize the psychological motivation of their roles (1863-1938)	a theatrical performer
	a person who makes deceitful pretenses