humped vs crookback

humped is not a noun while crookback is a noun.

Word	Noun	Adjective	Verb	Adverb
humped	No	Yes	No	No
crookback	Yes	Yes	No	No

As adjectives, humped and crookback are synonyms defined as:

humped and crookback: characteristic of or suffering from kyphosis, an abnormality of the vertebral column

Other synonyms of humped include crookbacked, gibbous, humpbacked, hunchbacked, kyphotic.

humped (noun)	crookback (noun)
	a person whose back is hunched because of abnormal curvature of the upper spine

humped (adjective)	crookback (adjective)
characteristic of or suffering from kyphosis, an abnormality of the vertebral column	characteristic of or suffering from kyphosis, an abnormality of the vertebral column