nervus trigeminus vs trigeminal nerve

nervus trigeminus and trigeminal nerve both are nouns.

Word	Noun	Adjective	Verb	Adverb
nervus trigeminus	Yes	No	No	No
trigeminal nerve	Yes	No	No	No

As nouns, nervus trigeminus and trigeminal nerve are synonyms defined as:

nervus trigeminus and trigeminal nerve: the main sensory nerve of the face and motor nerve for the muscles of mastication

Other synonyms of nervus trigeminus include fifth cranial nerve, trigeminal, trigeminus.

nervus trigeminus (noun)	trigeminal nerve (noun)
the main sensory nerve of the face and motor nerve for the muscles of mastication	the main sensory nerve of the face and motor nerve for the muscles of mastication