hump vs hunch forward

hump is a noun but hunch forward is not a noun.

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

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

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

Other synonyms of hump include hunch, hunch over.

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

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