renal vein vs vena renalis

renal vein and vena renalis both are nouns.

Word	Noun	Adjective	Verb	Adverb
renal vein	Yes	No	No	No
vena renalis	Yes	No	No	No

As nouns, renal vein and vena renalis are synonyms defined as:

renal vein and vena renalis: veins that accompany renal arteries; open into the vena cava at the level of the 2nd lumbar vertebra

renal vein (noun)	vena renalis (noun)
veins that accompany renal arteries; open into the vena cava at the level of the 2nd lumbar vertebra	veins that accompany renal arteries; open into the vena cava at the level of the 2nd lumbar vertebra