brachiocephalic vein vs innominate vein

brachiocephalic vein and innominate vein both are nouns.

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

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

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

Other synonyms of brachiocephalic vein include vena brachiocephalica.

brachiocephalic vein (noun)	innominate 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