drone pipe vs bourdon

drone pipe and bourdon both are nouns.

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

As nouns, drone pipe and bourdon are synonyms defined as:

drone pipe and bourdon: a pipe of the bagpipe that is tuned to produce a single continuous tone

Other synonyms of drone pipe include drone.

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