supratrochlear vein vs vena

supratrochlear vein and vena both are nouns.

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

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

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

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

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