hepatic vein vs vena hepatica

hepatic vein and vena hepatica both are nouns.

Word	Noun	Adjective	Verb	Adverb
hepatic vein	Yes	No	No	No
vena hepatica	Yes	No	No	No

As nouns, hepatic vein and vena hepatica are synonyms defined as:

hepatic vein and vena hepatica: a vein that drains the liver; empties into the vena cava

hepatic vein (noun)	vena hepatica (noun)
a vein that drains the liver; empties into the vena cava	a vein that drains the liver; empties into the vena cava