disputant vs actor

disputant and actor both are nouns.

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

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

Other hypernyms of disputant include doer, worker.

disputant (noun)	actor (noun)
a person who disputes; who is good at or enjoys controversy	a theatrical performer
	a person who acts and gets things done