combatant vs actor

combatant and actor both are nouns.

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

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

Other hypernyms of combatant include doer, worker.

combatant (noun)	actor (noun)
someone who fights (or is fighting)	a theatrical performer
	a person who acts and gets things done

combatant (adjective)	actor (adjective)
engaging in or ready for combat