trigeminal nerve vs nervus trigeminus

trigeminal nerve and nervus trigeminus both are nouns.

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

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

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

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

trigeminal nerve (noun)	nervus trigeminus (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