standpipe vs piping

standpipe and piping both are nouns.

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

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

standpipe: a vertical pipe
piping: a long tube made of metal or plastic that is used to carry water or oil or gas etc.

Other hypernyms of standpipe include pipage, pipe.

standpipe (noun)	piping (noun)
a vertical pipe	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

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