basal vein vs vena

basal vein and vena both are nouns.

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

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

basal vein: a large vein passing along the medial surface of the temporal lobe and emptying into the great cerebral vein
vena: a blood vessel that carries blood from the capillaries toward the heart

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

basal vein (noun)	vena (noun)
a large vein passing along the medial surface of the temporal lobe and emptying into the great cerebral vein	a blood vessel that carries blood from the capillaries toward the heart