roleplay vs ham

roleplay is not a noun while ham is a noun.

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

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

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

roleplay (noun)	ham (noun)
	meat cut from the thigh of a hog (usually smoked)
	an unskilled actor who overacts
	a licensed amateur radio operator

roleplay (verb)	ham (verb)
perform on a stage or theater	exaggerate one's acting