vena lumbalis vs lumbar vein

vena lumbalis and lumbar vein both are nouns.

Word	Noun	Adjective	Verb	Adverb
vena lumbalis	Yes	No	No	No
lumbar vein	Yes	No	No	No

As nouns, vena lumbalis and lumbar vein are synonyms defined as:

vena lumbalis and lumbar vein: veins that drain the posterior body wall and the lumbar vertebral venous plexuses

vena lumbalis (noun)	lumbar vein (noun)
veins that drain the posterior body wall and the lumbar vertebral venous plexuses	veins that drain the posterior body wall and the lumbar vertebral venous plexuses