musclebuilder vs actor

musclebuilder and actor both are nouns.

Word	Noun	Adjective	Verb	Adverb
musclebuilder	Yes	No	No	No
actor	Yes	No	No	No

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

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

Other hypernyms of musclebuilder include doer, worker.

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