portal vein vs vena portae

portal vein and vena portae both are nouns.

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

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

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

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

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