dorsal scapular vein vs vena

dorsal scapular vein and vena both are nouns.

Word	Noun	Adjective	Verb	Adverb
dorsal scapular vein	Yes	No	No	No
vena	Yes	No	No	No

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

dorsal scapular vein: vein that is a tributary of the subclavian vein or external jugular vein and accompanies the descending scapular artery
vena: a blood vessel that carries blood from the capillaries toward the heart

Other hypernyms of dorsal scapular vein include vein, venous blood vessel.

dorsal scapular vein (noun)	vena (noun)
vein that is a tributary of the subclavian vein or external jugular vein and accompanies the descending scapular artery	a blood vessel that carries blood from the capillaries toward the heart