swaybacked vs swayback

swaybacked and swayback both are adjectives.

Word	Noun	Adjective	Verb	Adverb
swaybacked	No	Yes	No	No
swayback	No	Yes	No	No

As adjectives, swaybacked and swayback are synonyms defined as:

swaybacked and swayback: having abnormal sagging of the spine (especially in horses)

Other synonyms of swaybacked include dipped, lordotic.

swaybacked (adjective)	swayback (adjective)
having abnormal sagging of the spine (especially in horses)	having abnormal sagging of the spine (especially in horses)