fire-eater vs fire-swallower

fire-eater and fire-swallower both are nouns.

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

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

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