cartilaginous tube vs duct

cartilaginous tube and duct both are nouns.

Word	Noun	Adjective	Verb	Adverb
cartilaginous tube	Yes	No	No	No
duct	Yes	No	No	No

As nouns, duct is a hypernym of cartilaginous tube; that is, duct is a word with a broader meaning than cartilaginous tube:

cartilaginous tube: a duct with cartilaginous walls
duct: a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance

Other hypernyms of cartilaginous tube include canal, channel, epithelial duct.

cartilaginous tube (noun)	duct (noun)
a duct with cartilaginous walls	an enclosed conduit for a fluid
	a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance
	a continuous tube formed by a row of elongated cells lacking intervening end walls