luxuriate vs exhaust

luxuriate is not a noun while exhaust is a noun.

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

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

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

luxuriate (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

luxuriate (verb)	exhaust (verb)
thrive profusely or flourish extensively	wear out completely
become extravagant; indulge (oneself) luxuriously	eliminate (a substance)
enjoy to excess	use up the whole supply of
	use up (resources or materials)
	deplete