arteria brachialis vs arteria

arteria brachialis and arteria both are nouns.

Word	Noun	Adjective	Verb	Adverb
arteria brachialis	Yes	No	No	No
arteria	Yes	No	No	No

As nouns, arteria is a hypernym of arteria brachialis; that is, arteria is a word with a broader meaning than arteria brachialis:

arteria brachialis: the main artery of the upper arm; a continuation of the axillary artery; bifurcates into the radial and ulnar arteries at the elbow
arteria: a blood vessel that carries blood from the heart to the body

Other hypernyms of arteria brachialis include arterial blood vessel, artery.

arteria brachialis (noun)	arteria (noun)
the main artery of the upper arm; a continuation of the axillary artery; bifurcates into the radial and ulnar arteries at the elbow	a blood vessel that carries blood from the heart to the body