slump vs go down

slump is a noun but go down is not a noun.

Word	Noun	Adjective	Verb	Adverb
slump	Yes	No	Yes	No
go down	No	No	Yes	No

As verbs, go down is a hypernym of slump; that is, go down is a word with a broader meaning than slump:

Other hypernyms of slump include come down, descend, fall.

slump (noun)	go down (noun)
a noticeable deterioration in performance or quality
a long-term economic state characterized by unemployment and low prices and low levels of trade and investment

slump (verb)	go down (verb)
fall heavily or suddenly; decline markedly	grow smaller
fall or sink heavily	stop operating
assume a drooping posture or carriage	be defeated
fall in value	be ingested
	go under
	disappear beyond the horizon
	move downward and lower, but not necessarily all the way
	be recorded or remembered