vertebral vein vs vena

vertebral vein and vena both are nouns.

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

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

vertebral vein: a vein that goes through the foramina of the cervical vertebrae and forms a plexus around the vertebral artery; empties into the brachiocephalic vein
vena: a blood vessel that carries blood from the capillaries toward the heart

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

vertebral vein (noun)	vena (noun)
a vein that goes through the foramina of the cervical vertebrae and forms a plexus around the vertebral artery; empties into the brachiocephalic vein	a blood vessel that carries blood from the capillaries toward the heart