exhaust pipe vs pipe

exhaust pipe and pipe both are nouns.

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

As nouns, pipe is a hypernym of exhaust pipe; that is, pipe is a word with a broader meaning than exhaust pipe:

exhaust pipe: a pipe through which burned gases travel from the exhaust manifold to the muffler
pipe: a long tube made of metal or plastic that is used to carry water or oil or gas etc.

Other hypernyms of exhaust pipe include pipage, piping.

exhaust pipe (noun)	pipe (noun)
a pipe through which burned gases travel from the exhaust manifold to the muffler	a long tube made of metal or plastic that is used to carry water or oil or gas etc.
	a tube with a small bowl at one end; used for smoking tobacco
	the flues and stops on a pipe organ
	a tubular wind instrument
	a hollow cylindrical shape