denizen vs worker

denizen and worker both are nouns.

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

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

Other hypernyms of denizen include actor, doer.

denizen (noun)	worker (noun)
a plant or animal naturalized in a region	sterile member of a colony of social insects that forages for food and cares for the larvae
a person who inhabits a particular place	a person who works at a specific occupation
	a member of the working class (not necessarily employed)
	a person who acts and gets things done