denizen vs being

denizen and being both are nouns.

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

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

denizen: a plant or animal naturalized in a region
being: a living thing that has (or can develop) the ability to act or function independently

Other hypernyms of denizen include organism.

denizen (noun)	being (noun)
a plant or animal naturalized in a region	a living thing that has (or can develop) the ability to act or function independently
a person who inhabits a particular place	the state or fact of existing