appendicular vein vs vena

appendicular vein and vena both are nouns.

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

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

appendicular vein: a vein that accompanies the appendicular artery and empties into the ileocolic vein
vena: a blood vessel that carries blood from the capillaries toward the heart

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

appendicular vein (noun)	vena (noun)
a vein that accompanies the appendicular artery and empties into the ileocolic vein	a blood vessel that carries blood from the capillaries toward the heart