arteria labialis vs labial artery

arteria labialis and labial artery both are nouns.

Word	Noun	Adjective	Verb	Adverb
arteria labialis	Yes	No	No	No
labial artery	Yes	No	No	No

As nouns, arteria labialis and labial artery are synonyms defined as:

arteria labialis and labial artery: an artery that is a branch of the facial artery that supplies the lips of the mouth

arteria labialis (noun)	labial artery (noun)
an artery that is a branch of the facial artery that supplies the lips of the mouth	an artery that is a branch of the facial artery that supplies the lips of the mouth