vena brachiocephalica vs brachiocephalic vein

vena brachiocephalica and brachiocephalic vein both are nouns.

Word	Noun	Adjective	Verb	Adverb
vena brachiocephalica	Yes	No	No	No
brachiocephalic vein	Yes	No	No	No

As nouns, vena brachiocephalica and brachiocephalic vein are synonyms defined as:

vena brachiocephalica and brachiocephalic vein: veins formed by the union of the internal jugular and subclavian veins

Other synonyms of vena brachiocephalica include innominate vein.

vena brachiocephalica (noun)	brachiocephalic vein (noun)
veins formed by the union of the internal jugular and subclavian veins	veins formed by the union of the internal jugular and subclavian veins