occupier vs denizen

occupier and denizen both are nouns.

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

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

occupier: someone who lives at a particular place for a prolonged period or who was born there
denizen: a person who inhabits a particular place

Other hypernyms of occupier include dweller, habitant, indweller, inhabitant.

occupier (noun)	denizen (noun)
someone who lives at a particular place for a prolonged period or who was born there	a plant or animal naturalized in a region
a member of a military force who is residing in a conquered foreign country	a person who inhabits a particular place