labial artery vs arteria labialis

labial artery and arteria labialis both are nouns.

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

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

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

labial artery (noun)	arteria labialis (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