inmate vs prisoner

inmate and prisoner both are nouns.

Word	Noun	Adjective	Verb	Adverb
inmate	Yes	No	No	No
prisoner	Yes	No	No	No

As nouns, prisoner is a hypernym of inmate; that is, prisoner is a word with a broader meaning than inmate:

Other hypernyms of inmate include captive.

inmate (noun)	prisoner (noun)
one of several resident of a dwelling (especially someone confined to a prison or hospital)	a person who is confined; especially a prisoner of war
a patient who is residing in the hospital where he is being treated
a person serving a sentence in a jail or prison