dorsal horn vs posterior root

dorsal horn and posterior root both are nouns.

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

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

dorsal horn and posterior 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 dorsal root, posterior horn.

dorsal horn (noun)	posterior 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