lacrimal duct vs tear duct

lacrimal duct and tear duct both are nouns.

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

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

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

Other synonyms of lacrimal duct include lachrymal duct.

lacrimal duct (noun)	tear 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