perforating vein vs vena

perforating vein and vena both are nouns.

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

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

perforating vein: veins that accompany the perforating arteries; drain leg muscles; empty into the deep femoral vein
vena: a blood vessel that carries blood from the capillaries toward the heart

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

perforating vein (noun)	vena (noun)
veins that accompany the perforating arteries; drain leg muscles; empty into the deep femoral vein	a blood vessel that carries blood from the capillaries toward the heart