tailpipe vs pipe

tailpipe and pipe both are nouns.

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

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

tailpipe: a pipe carrying fumes from the muffler to the rear of a car
pipe: a long tube made of metal or plastic that is used to carry water or oil or gas etc.

Other hypernyms of tailpipe include pipage, piping.

tailpipe (noun)	pipe (noun)
a pipe carrying fumes from the muffler to the rear of a car	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