slouch vs slump

slouch and slump both are nouns.

Word	Noun	Adjective	Verb	Adverb
slouch	Yes	No	Yes	No
slump	Yes	No	Yes	No

As verbs, slouch and slump are synonyms defined as:

slouch (noun)	slump (noun)
a stooping carriage in standing and walking	a noticeable deterioration in performance or quality
an incompetent person; usually used in negative constructions	a long-term economic state characterized by unemployment and low prices and low levels of trade and investment

slouch (verb)	slump (verb)
walk slovenly	fall heavily or suddenly; decline markedly
assume a drooping posture or carriage	fall or sink heavily
	assume a drooping posture or carriage
	fall in value