lachrymal duct vs duct

lachrymal duct and duct both are nouns.

Word	Noun	Adjective	Verb	Adverb
lachrymal duct	Yes	No	No	No
duct	Yes	No	No	No

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

lachrymal duct: any of several small ducts that carry tears from the lacrimal glands
duct: a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance

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

lachrymal duct (noun)	duct (noun)
any of several small ducts that carry tears from the lacrimal glands	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