fire warden vs firefighter

fire warden and firefighter both are nouns.

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

As nouns, firefighter is a hypernym of fire warden; that is, firefighter 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
firefighter: a member of a fire department who tries to extinguish fires

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

fire warden (noun)	firefighter (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