vena genus vs vena

vena genus and vena both are nouns.

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

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

vena genus: veins that drain blood from structures around the knee; empty into the popliteal vein
vena: a blood vessel that carries blood from the capillaries toward the heart

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

vena genus (noun)	vena (noun)
veins that drain blood from structures around the knee; empty into the popliteal vein	a blood vessel that carries blood from the capillaries toward the heart