fire-eater vs firefighter

fire-eater and firefighter both are nouns.

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

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

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

Other synonyms of fire-eater include fire fighter, fireman.

fire-eater (noun)	firefighter (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