innominate vein vs brachiocephalic vein

innominate vein and brachiocephalic vein both are nouns.

Word	Noun	Adjective	Verb	Adverb
innominate vein	Yes	No	No	No
brachiocephalic vein	Yes	No	No	No

As nouns, innominate vein and brachiocephalic vein are synonyms defined as:

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

Other synonyms of innominate vein include vena brachiocephalica.

innominate vein (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