gluteal vein vs vena

gluteal vein and vena both are nouns.

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

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

gluteal vein: veins draining the gluteal muscles on either side of the body
vena: a blood vessel that carries blood from the capillaries toward the heart

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

gluteal vein (noun)	vena (noun)
veins draining the gluteal muscles on either side of the body	a blood vessel that carries blood from the capillaries toward the heart