tailpipe vs piping

tailpipe and piping both are nouns.

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

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

tailpipe: a pipe carrying fumes from the muffler to the rear of a car
piping: 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, pipe.

tailpipe (noun)	piping (noun)
a pipe carrying fumes from the muffler to the rear of a car	playing a pipe or the bagpipes
	a long tube made of metal or plastic that is used to carry water or oil or gas etc.
	a thin strip of covered cord used to edge hems

tailpipe (adverb)	piping (adverb)
	(used of heat) extremely