internal auditory artery vs artery of the labyrinth

internal auditory artery and artery of the labyrinth both are nouns.

Word	Noun	Adjective	Verb	Adverb
internal auditory artery	Yes	No	No	No
artery of the labyrinth	Yes	No	No	No

As nouns, internal auditory artery and artery of the labyrinth are synonyms defined as:

internal auditory artery and artery of the labyrinth: an artery that is a branch of the basilar artery that supplies the labyrinth

Other synonyms of internal auditory artery include labyrinthine artery.

internal auditory artery (noun)	artery of the labyrinth (noun)
an artery that is a branch of the basilar artery that supplies the labyrinth	an artery that is a branch of the basilar artery that supplies the labyrinth