kyphosis vs hunchback

kyphosis and hunchback both are nouns.

Word	Noun	Adjective	Verb	Adverb
kyphosis	Yes	No	No	No
hunchback	Yes	No	No	No

As nouns, kyphosis and hunchback are synonyms defined as:

kyphosis and hunchback: an abnormal backward curve to the vertebral column

Other synonyms of kyphosis include humpback.

kyphosis (noun)	hunchback (noun)
The property of having an abnormal convex curvature in the cervical or lumbar regions of the spine.	a person whose back is hunched because of abnormal curvature of the upper spine
an abnormal backward curve to the vertebral column	an abnormal backward curve to the vertebral column