afferent nerve vs afferent fiber

afferent nerve and afferent fiber both are nouns.

Word	Noun	Adjective	Verb	Adverb
afferent nerve	Yes	No	No	No
afferent fiber	Yes	No	No	No

afferent nerve (noun)	afferent fiber (noun)
a nerve that passes impulses from receptors toward or to the central nervous system	a nerve fiber that carries impulses toward the central nervous system