motor fiber vs efferent fiber

motor fiber and efferent fiber both are nouns.

Word	Noun	Adjective	Verb	Adverb
motor fiber	Yes	No	No	No
efferent fiber	Yes	No	No	No

As nouns, motor fiber and efferent fiber are synonyms defined as:

motor fiber and efferent fiber: a nerve fiber that carries impulses toward the muscles or glands

motor fiber (noun)	efferent fiber (noun)
a nerve fiber that carries impulses toward the muscles or glands	a nerve fiber that carries impulses toward the muscles or glands