disputant vs doer

disputant and doer both are nouns.

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

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

Other hypernyms of disputant include actor, worker.

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