fire warden vs fire fighter

fire warden and fire fighter both are nouns.

Word	Noun	Adjective	Verb	Adverb
fire warden	Yes	No	No	No
fire fighter	Yes	No	No	No

As nouns, fire fighter is a hypernym of fire warden; that is, fire fighter is a word with a broader meaning than fire warden:

fire warden: an official who is responsible for managing and protecting an area of forest
fire fighter: a member of a fire department who tries to extinguish fires

Other hypernyms of fire warden include fire-eater, firefighter, fireman, functionary, official.

fire warden (noun)	fire fighter (noun)
an official who is responsible for managing and protecting an area of forest	a member of a fire department who tries to extinguish fires