supraorbital vein vs vena

supraorbital vein and vena both are nouns.

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

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

supraorbital vein: drains the front of the scalp; unites with the supratrochlear vein to form the angular vein
vena: a blood vessel that carries blood from the capillaries toward the heart

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

supraorbital vein (noun)	vena (noun)
drains the front of the scalp; unites with the supratrochlear vein to form the angular vein	a blood vessel that carries blood from the capillaries toward the heart