paraumbilical vein vs vena

paraumbilical vein and vena both are nouns.

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

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

paraumbilical vein: small veins arising in skin around the navel; terminate as accessory portal veins
vena: a blood vessel that carries blood from the capillaries toward the heart

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

paraumbilical vein (noun)	vena (noun)
small veins arising in skin around the navel; terminate as accessory portal veins	a blood vessel that carries blood from the capillaries toward the heart