tear duct vs epithelial duct

tear duct and epithelial duct both are nouns.

Word	Noun	Adjective	Verb	Adverb
tear duct	Yes	No	No	No
epithelial duct	Yes	No	No	No

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

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

Other hypernyms of tear duct include canal, channel, duct.

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