muscle builder vs actor

muscle builder and actor both are nouns.

Word	Noun	Adjective	Verb	Adverb
muscle builder	Yes	No	No	No
actor	Yes	No	No	No

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

muscle builder: someone who does special exercises to develop a brawny musculature
actor: a person who acts and gets things done

Other hypernyms of muscle builder include doer, worker.

muscle builder (noun)	actor (noun)
someone who does special exercises to develop a brawny musculature	a theatrical performer
	a person who acts and gets things done