nonparticipant vs actor

nonparticipant and actor both are nouns.

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

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

Other hypernyms of nonparticipant include doer, worker.

nonparticipant (noun)	actor (noun)
a person who does not participate	a theatrical performer
	a person who acts and gets things done