discharge pipe vs pipe

discharge pipe and pipe both are nouns.

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

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

discharge pipe: a pipe through which fluids can be discharged
pipe: a long tube made of metal or plastic that is used to carry water or oil or gas etc.

Other hypernyms of discharge pipe include pipage, piping.

discharge pipe (noun)	pipe (noun)
a pipe through which fluids can be discharged	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