fire-eater vs fire fighter

fire-eater and fire fighter both are nouns.

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

As nouns, fire-eater and fire fighter are synonyms defined as:

fire-eater and fire fighter: a member of a fire department who tries to extinguish fires

Other synonyms of fire-eater include firefighter, fireman.

fire-eater (noun)	fire fighter (noun)
a performer who pretends to swallow fire	a member of a fire department who tries to extinguish fires
a belligerent grouch
a member of a fire department who tries to extinguish fires