antagonist vs actor

antagonist and actor both are nouns.

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

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

Other hypernyms of antagonist include doer, worker.

antagonist (noun)	actor (noun)
a drug that neutralizes or counteracts the effects of another drug	a theatrical performer
a muscle that relaxes while another contracts	a person who acts and gets things done
someone who offers opposition