exhaust vs spend

exhaust is a noun but spend is not a noun.

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

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

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