play out vs exhaust

play out is not a noun while exhaust is a noun.

Word	Noun	Adjective	Verb	Adverb
play out	No	No	Yes	No
exhaust	Yes	No	Yes	No

As verbs, play out and exhaust are synonyms defined as:

Other synonyms of play out include run down, sap, tire.

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

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

play out (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

play out (verb)	exhaust (verb)
become spent or exhausted	wear out completely
play to a finish	eliminate (a substance)
perform or be performed to the end	use up the whole supply of
deplete	use up (resources or materials)
	deplete