pacifist vs doer

pacifist and doer both are nouns.

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

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

Other hypernyms of pacifist include actor, worker.

pacifist (noun)	doer (noun)
someone opposed to violence as a means of settling disputes	a person who acts and gets things done

pacifist (adjective)	doer (adjective)
opposed to war