dorsal horn vs dorsal root

dorsal horn and dorsal root both are nouns.

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

As nouns, dorsal horn and dorsal root are synonyms defined as:

dorsal horn and dorsal root: one of two roots of a spinal nerve that passes dorsally from the spinal cord and that consists of sensory fibers

Other synonyms of dorsal horn include posterior horn, posterior root.

dorsal horn (noun)	dorsal root (noun)
one of two roots of a spinal nerve that passes dorsally from the spinal cord and that consists of sensory fibers	one of two roots of a spinal nerve that passes dorsally from the spinal cord and that consists of sensory fibers