hautbois vs double reed

hautbois and double reed both are nouns.

Word	Noun	Adjective	Verb	Adverb
hautbois	Yes	No	No	No
double reed	Yes	No	No	No

As nouns, double reed is a hypernym of hautbois; that is, double reed is a word with a broader meaning than hautbois:

hautbois: a slender double-reed instrument; a woodwind with a conical bore and a double-reed mouthpiece
double reed: a woodwind that has a pair of joined reeds that vibrate together

Other hypernyms of hautbois include double-reed instrument.

hautbois (noun)	double reed (noun)
a slender double-reed instrument; a woodwind with a conical bore and a double-reed mouthpiece	a pair of joined reeds that vibrate together to produce the sound in some woodwinds
	a woodwind that has a pair of joined reeds that vibrate together