fire-eater vs ranger

fire-eater and ranger both are nouns.

Word	Noun	Adjective	Verb	Adverb
fire-eater	Yes	No	No	No
ranger	Yes	No	No	No

As nouns, ranger is a hyponym of fire-eater; that is, ranger is a word with a more specific, narrower meaning than fire-eater:

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

Other hyponyms of fire-eater include fire chief, fire marshal, fire warden, forest fire fighter.

fire-eater (noun)	ranger (noun)
a performer who pretends to swallow fire	an official who is responsible for managing and protecting an area of forest
a belligerent grouch	a member of a military unit trained as shock troops for hit-and-run raids
a member of a fire department who tries to extinguish fires