spend vs exhaust

spend is not a noun while exhaust is a noun.

Word	Noun	Adjective	Verb	Adverb
spend	No	No	Yes	No
exhaust	Yes	No	Yes	No

As verbs, exhaust is a hypernym of spend; that is, exhaust is a word with a broader meaning than spend:

Other hypernyms of spend include consume, deplete, eat, eat up, expend, run through, use, use up, wipe out, pay.

As verbs, exhaust is a hypernym of spend; that is, exhaust is a word with a broader meaning than spend:

Other hypernyms of spend include consume, deplete, eat, eat up, expend, run through, use, use up, wipe out.

spend (noun)	exhaust (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

spend (verb)	exhaust (verb)
pay out	wear out completely
spend completely	eliminate (a substance)
use up a period of time in a specific way	use up the whole supply of
	use up (resources or materials)
	deplete