bourdon vs pipe

bourdon and pipe both are nouns.

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

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

bourdon: a pipe of the bagpipe that is tuned to produce a single continuous tone
pipe: a tubular wind instrument

bourdon (noun)	pipe (noun)
a pipe of the bagpipe that is tuned to produce a single continuous tone	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