exhaust vs spit out

exhaust is a noun but spit out is not a noun.

Word	Noun	Adjective	Verb	Adverb
exhaust	Yes	No	Yes	No
spit out	No	No	Yes	No

As verbs, spit out is a hyponym of exhaust; that is, spit out is a word with a more specific, narrower meaning than exhaust:

exhaust (noun)	spit out (noun)
system consisting of the parts of an engine through which burned gases or steam are discharged
gases ejected from an engine as waste products

exhaust (verb)	spit out (verb)
wear out completely	spit up in an explosive manner
eliminate (a substance)	discharge (phlegm or sputum) from the lungs and out of the mouth
use up the whole supply of	utter with anger or contempt
use up (resources or materials)
deplete