fire up vs ferment

fire up is not a noun while ferment is a noun.

Word	Noun	Adjective	Verb	Adverb
fire up	No	No	Yes	No
ferment	Yes	No	Yes	No

As verbs, ferment is a hyponym of fire up; that is, ferment is a word with a more specific, narrower meaning than fire up:

fire up (noun)	ferment (noun)
	a process in which an agent causes an organic substance to break down into simpler substances; especially, the anaerobic breakdown of sugar into alcohol
	a state of agitation or turbulent change or development
	a substance capable of bringing about fermentation

fire up (verb)	ferment (verb)
begin to smoke	go sour or spoil
arouse or excite feelings and passions	cause to undergo fermentation
	work up into agitation or excitement
	be in an agitated or excited state