motorial vs efferent

motorial is not a noun while efferent is a noun.

Word	Noun	Adjective	Verb	Adverb
motorial	No	Yes	No	No
efferent	Yes	Yes	No	No

As adjectives, motorial and efferent are synonyms defined as:

motorial and efferent: of nerves and nerve impulses; conveying information away from the CNS

motorial (noun)	efferent (noun)
	a nerve that conveys impulses toward or to muscles or glands

motorial (adjective)	efferent (adjective)
of nerves and nerve impulses; conveying information away from the CNS	of nerves and nerve impulses; conveying information away from the CNS