hautboy vs oboe

hautboy and oboe both are nouns.

Word	Noun	Adjective	Verb	Adverb
hautboy	Yes	No	No	No
oboe	Yes	No	No	No

As nouns, hautboy and oboe are synonyms defined as:

hautboy and oboe: a slender double-reed instrument; a woodwind with a conical bore and a double-reed mouthpiece

Other synonyms of hautboy include hautbois.

hautboy (noun)	oboe (noun)
a slender double-reed instrument; a woodwind with a conical bore and a double-reed mouthpiece	a slender double-reed instrument; a woodwind with a conical bore and a double-reed mouthpiece