venae pancreatica vs vena

venae pancreatica and vena both are nouns.

Word	Noun	Adjective	Verb	Adverb
venae pancreatica	Yes	No	No	No
vena	Yes	No	No	No

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

venae pancreatica: veins draining the pancreas and emptying into the superior mesenteric and splenic veins
vena: a blood vessel that carries blood from the capillaries toward the heart

Other hypernyms of venae pancreatica include vein, venous blood vessel.

venae pancreatica (noun)	vena (noun)
veins draining the pancreas and emptying into the superior mesenteric and splenic veins	a blood vessel that carries blood from the capillaries toward the heart