hautboy vs double reed

hautboy and double reed both are nouns.

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

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

hautboy: 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 hautboy include double-reed instrument.

hautboy (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