posterior root vs posterior horn

posterior root and posterior horn both are nouns.

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

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

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

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

posterior root (noun)	posterior horn (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