hunch over vs hump

hunch over is not a noun while hump is a noun.

Word	Noun	Adjective	Verb	Adverb
hunch over	No	No	Yes	No
hump	Yes	No	Yes	No

As verbs, hunch over and hump are synonyms defined as:

hunch over and hump: round one's back by bending forward and drawing the shoulders forward

Other synonyms of hunch over include hunch, hunch forward.

hunch over (noun)	hump (noun)
	something that bulges out or is protuberant or projects from its surroundings

hunch over (verb)	hump (verb)
round one's back by bending forward and drawing the shoulders forward	have sexual intercourse with
	round one's back by bending forward and drawing the shoulders forward