firefighter vs fire-eater

firefighter and fire-eater both are nouns.

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

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

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

Other synonyms of firefighter include fire fighter, fireman.

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