lachrymal duct vs tear duct

lachrymal duct and tear duct both are nouns.

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

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

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

Other synonyms of lachrymal duct include lacrimal duct.

lachrymal 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