anterior horn vs efferent

anterior horn and efferent both are nouns.

Word	Noun	Adjective	Verb	Adverb
anterior horn	Yes	No	No	No
efferent	Yes	Yes	No	No

As nouns, efferent is a hypernym of anterior horn; that is, efferent is a word with a broader meaning than anterior horn:

anterior horn: one of the two roots of a spinal nerve that passes ventrally from the spinal cord and that consists of motor fibers
efferent: a nerve that conveys impulses toward or to muscles or glands

Other hypernyms of anterior horn include efferent nerve, motor nerve.

anterior horn (noun)	efferent (noun)
one of the two roots of a spinal nerve that passes ventrally from the spinal cord and that consists of motor fibers	a nerve that conveys impulses toward or to muscles or glands

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