vena mesenterica vs mesenteric vein

vena mesenterica and mesenteric vein both are nouns.

Word	Noun	Adjective	Verb	Adverb
vena mesenterica	Yes	No	No	No
mesenteric vein	Yes	No	No	No

As nouns, vena mesenterica and mesenteric vein are synonyms defined as:

vena mesenterica and mesenteric vein: a tributary of the portal vein passing from the intestine between the two layers of mesentery

vena mesenterica (noun)	mesenteric vein (noun)
a tributary of the portal vein passing from the intestine between the two layers of mesentery	a tributary of the portal vein passing from the intestine between the two layers of mesentery