pantomimist vs role player

pantomimist and role player both are nouns.

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

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

pantomimist: an actor who communicates entirely by gesture and facial expression
role player: a theatrical performer

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

pantomimist (noun)	role player (noun)
an actor who communicates entirely by gesture and facial expression	a theatrical performer
	a person who makes deceitful pretenses