radial vein vs vena radialis

radial vein and vena radialis both are nouns.

Word	Noun	Adjective	Verb	Adverb
radial vein	Yes	No	No	No
vena radialis	Yes	No	No	No

As nouns, radial vein and vena radialis are synonyms defined as:

radial vein and vena radialis: superficial veins ascending the radial side of the forearm; combines with the ulnar veins to form the brachial vein

radial vein (noun)	vena radialis (noun)
superficial veins ascending the radial side of the forearm; combines with the ulnar veins to form the brachial vein	superficial veins ascending the radial side of the forearm; combines with the ulnar veins to form the brachial vein