vena vertebralis anterior vs anterior vertebral vein

vena vertebralis anterior and anterior vertebral vein both are nouns.

Word	Noun	Adjective	Verb	Adverb
vena vertebralis anterior	Yes	No	No	No
anterior vertebral vein	Yes	No	No	No

As nouns, vena vertebralis anterior and anterior vertebral vein are synonyms defined as:

vena vertebralis anterior and anterior vertebral vein: a vein that accompanies the ascending cervical artery and opens into the vertebral vein

vena vertebralis anterior (noun)	anterior vertebral vein (noun)
a vein that accompanies the ascending cervical artery and opens into the vertebral vein	a vein that accompanies the ascending cervical artery and opens into the vertebral vein