roleplay vs pantomime

roleplay is not a noun while pantomime is a noun.

Word	Noun	Adjective	Verb	Adverb
roleplay	No	No	Yes	No
pantomime	Yes	No	Yes	No

As verbs, pantomime is a hyponym of roleplay; that is, pantomime is a word with a more specific, narrower meaning than roleplay:

roleplay: perform on a stage or theater
pantomime: act out without words but with gestures and bodily movements only

Other hyponyms of roleplay include stooge, mime, ham, ham it up, overact, overplay, underact, underplay.

roleplay (noun)	pantomime (noun)
	a performance using gestures and body movements without words

roleplay (verb)	pantomime (verb)
perform on a stage or theater	act out without words but with gestures and bodily movements only