heckelphone vs hautbois

heckelphone and hautbois both are nouns.

Word	Noun	Adjective	Verb	Adverb
heckelphone	Yes	No	No	No
hautbois	Yes	No	No	No

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

heckelphone: an oboe pitched an octave below the ordinary oboe
hautbois: a slender double-reed instrument; a woodwind with a conical bore and a double-reed mouthpiece

Other hypernyms of heckelphone include hautboy, oboe.

heckelphone (noun)	hautbois (noun)
an oboe pitched an octave below the ordinary oboe	a slender double-reed instrument; a woodwind with a conical bore and a double-reed mouthpiece