oboe vs hautboy

oboe and hautboy both are nouns.

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

As nouns, oboe and hautboy are synonyms defined as:

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

Other synonyms of oboe include hautbois.

oboe (noun)	hautboy (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