hunchback vs humpback

hunchback and humpback both are nouns.

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

As nouns, hunchback and humpback are synonyms defined as:

hunchback and humpback: a person whose back is hunched because of abnormal curvature of the upper spine

Other synonyms of hunchback include crookback.

As nouns, hunchback and humpback are synonyms defined as:

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

Other synonyms of hunchback include kyphosis.

hunchback (noun)	humpback (noun)
a person whose back is hunched because of abnormal curvature of the upper spine	large whalebone whale with long flippers noted for arching or humping its back as it dives
an abnormal backward curve to the vertebral column	a person whose back is hunched because of abnormal curvature of the upper spine
	an abnormal backward curve to the vertebral column