motor nerve fiber vs motoneuron

motor nerve fiber and motoneuron both are nouns.

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

As nouns, motor nerve fiber and motoneuron are synonyms defined as:

motor nerve fiber and motoneuron: a neuron conducting impulses outwards from the brain or spinal cord

Other synonyms of motor nerve fiber include efferent neuron, motor neuron.

motor nerve fiber (noun)	motoneuron (noun)
a neuron conducting impulses outwards from the brain or spinal cord	a neuron conducting impulses outwards from the brain or spinal cord