auricular vein vs vena

auricular vein and vena both are nouns.

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

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

auricular vein: one of two veins serving the ear region
vena: a blood vessel that carries blood from the capillaries toward the heart

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

auricular vein (noun)	vena (noun)
one of two veins serving the ear region	a blood vessel that carries blood from the capillaries toward the heart