weight gainer vs actor

weight gainer and actor both are nouns.

Word	Noun	Adjective	Verb	Adverb
weight gainer	Yes	No	No	No
actor	Yes	No	No	No

As nouns, actor is a hypernym of weight gainer; that is, actor is a word with a broader meaning than weight gainer:

Other hypernyms of weight gainer include doer, worker.

weight gainer (noun)	actor (noun)
a person who gains weight	a theatrical performer
	a person who acts and gets things done