cerebral vein vs vena

cerebral vein and vena both are nouns.

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

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

cerebral vein: any of several veins serving the cerebral hemispheres of the brain
vena: a blood vessel that carries blood from the capillaries toward the heart

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

cerebral vein (noun)	vena (noun)
any of several veins serving the cerebral hemispheres of the brain	a blood vessel that carries blood from the capillaries toward the heart