tear duct vs lacrimal duct

tear duct and lacrimal duct both are nouns.

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

As nouns, tear duct and lacrimal duct are synonyms defined as:

tear duct and lacrimal duct: any of several small ducts that carry tears from the lacrimal glands

Other synonyms of tear duct include lachrymal duct.

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