afferent vs dorsal horn

afferent and dorsal horn both are nouns.

Word	Noun	Adjective	Verb	Adverb
afferent	Yes	Yes	No	No
dorsal horn	Yes	No	No	No

As nouns, dorsal horn is a hyponym of afferent; that is, dorsal horn is a word with a more specific, narrower meaning than afferent:

afferent: a nerve that passes impulses from receptors toward or to the central nervous system
dorsal horn: one of two roots of a spinal nerve that passes dorsally from the spinal cord and that consists of sensory fibers

Other hyponyms of afferent include dorsal root, posterior horn, posterior root, fillet, lemniscus.

afferent (noun)	dorsal horn (noun)
a nerve that passes impulses from receptors toward or to the central nervous system	one of two roots of a spinal nerve that passes dorsally from the spinal cord and that consists of sensory fibers

afferent (adjective)	dorsal horn (adjective)
of nerves and nerve impulses; conveying sensory information from the sense organs to the CNS