cervical canal vs duct

cervical canal and duct both are nouns.

Word	Noun	Adjective	Verb	Adverb
cervical canal	Yes	No	No	No
duct	Yes	No	No	No

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

cervical canal: a spindle-shaped canal extending from the uterus to the vagina
duct: a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance

Other hypernyms of cervical canal include canal, channel, epithelial duct.

cervical canal (noun)	duct (noun)
a spindle-shaped canal extending from the uterus to the vagina	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