exhaust vs expectorate

exhaust is a noun but expectorate is not a noun.

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

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

exhaust: eliminate (a substance)
expectorate: discharge (phlegm or sputum) from the lungs and out of the mouth

exhaust (noun)	expectorate (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)	expectorate (verb)
wear out completely	discharge (phlegm or sputum) from the lungs and out of the mouth
eliminate (a substance)	clear out the chest and lungs
use up the whole supply of
use up (resources or materials)
deplete