exhaust vs excrete

exhaust is a noun but excrete is not a noun.

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

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

exhaust (noun)	excrete (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)	excrete (verb)
wear out completely	eliminate from the body
eliminate (a substance)
use up the whole supply of
use up (resources or materials)
deplete