vena poplitea vs vena

vena poplitea and vena both are nouns.

Word	Noun	Adjective	Verb	Adverb
vena poplitea	Yes	No	No	No
vena	Yes	No	No	No

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

vena poplitea: a vein arising in the knee and ascending to become the femoral vein
vena: a blood vessel that carries blood from the capillaries toward the heart

Other hypernyms of vena poplitea include vein, venous blood vessel.

vena poplitea (noun)	vena (noun)
a vein arising in the knee and ascending to become the femoral vein	a blood vessel that carries blood from the capillaries toward the heart