motor nerve fiber vs neuron

motor nerve fiber and neuron both are nouns.

Word	Noun	Adjective	Verb	Adverb
motor nerve fiber	Yes	No	No	No
neuron	Yes	No	No	No

As nouns, neuron is a hypernym of motor nerve fiber; that is, neuron is a word with a broader meaning than motor nerve fiber:

motor nerve fiber: a neuron conducting impulses outwards from the brain or spinal cord
neuron: a cell that is specialized to conduct nerve impulses

Other hypernyms of motor nerve fiber include nerve cell.

motor nerve fiber (noun)	neuron (noun)
a neuron conducting impulses outwards from the brain or spinal cord	a cell that is specialized to conduct nerve impulses