fire-eater vs hothead

fire-eater and hothead both are nouns.

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

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

fire-eater (noun)	hothead (noun)
a performer who pretends to swallow fire	a reckless impetuous irresponsible person
a belligerent grouch	a belligerent grouch
a member of a fire department who tries to extinguish fires