silencer vs exhaust

silencer and exhaust both are nouns.

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

silencer (noun)	exhaust (noun)
a tubular acoustic device inserted in the exhaust system that is designed to reduce noise	system consisting of the parts of an engine through which burned gases or steam are discharged
short tube attached to the muzzle of a gun that deadens the sound of firing	gases ejected from an engine as waste products

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