cephalic vein vs vena cephalica

cephalic vein and vena cephalica both are nouns.

Word	Noun	Adjective	Verb	Adverb
cephalic vein	Yes	No	No	No
vena cephalica	Yes	No	No	No

As nouns, cephalic vein and vena cephalica are synonyms defined as:

cephalic vein and vena cephalica: a large vein of the arm that empties into the axillary vein

cephalic vein (noun)	vena cephalica (noun)
a large vein of the arm that empties into the axillary vein	a large vein of the arm that empties into the axillary vein