denizen vs doer

denizen and doer both are nouns.

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

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

Other hypernyms of denizen include actor, worker.

denizen (noun)	doer (noun)
a plant or animal naturalized in a region	a person who acts and gets things done
a person who inhabits a particular place