nervus trigeminus vs trigeminal

nervus trigeminus and trigeminal both are nouns.

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

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

nervus trigeminus and trigeminal: 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 nerve, trigeminus.

nervus trigeminus (noun)	trigeminal (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