vena portae vs portal vein

vena portae and portal vein both are nouns.

Word	Noun	Adjective	Verb	Adverb
vena portae	Yes	No	No	No
portal vein	Yes	No	No	No

As nouns, vena portae and portal vein are synonyms defined as:

vena portae and portal vein: a short vein that carries blood into the liver

Other synonyms of vena portae include hepatic portal vein, portal.

vena portae (noun)	portal vein (noun)
a short vein that carries blood into the liver	a short vein that carries blood into the liver