lacrimal vein vs vena

lacrimal vein and vena both are nouns.

Word	Noun	Adjective	Verb	Adverb
lacrimal vein	Yes	No	No	No
vena	Yes	No	No	No

As nouns, vena is a hypernym of lacrimal vein; that is, vena is a word with a broader meaning than lacrimal vein:

lacrimal vein: drains the lacrimal gland; empties into the superior ophthalmic vein
vena: a blood vessel that carries blood from the capillaries toward the heart

Other hypernyms of lacrimal vein include vein, venous blood vessel.

lacrimal vein (noun)	vena (noun)
drains the lacrimal gland; empties into the superior ophthalmic vein	a blood vessel that carries blood from the capillaries toward the heart