pipe vs organ stop

pipe and organ stop both are nouns.

Word	Noun	Adjective	Verb	Adverb
pipe	Yes	No	Yes	No
organ stop	Yes	No	No	No

As nouns, organ stop is a hyponym of pipe; that is, organ stop is a word with a more specific, narrower meaning than pipe:

Other hyponyms of pipe include flue, flue pipe, labial pipe, reed pipe.

pipe (noun)	organ stop (noun)
a long tube made of metal or plastic that is used to carry water or oil or gas etc.	a graduated set of organ pipes of like tone quality
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