slump vs come down

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

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

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

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

slump (noun)	come 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)	come down (verb)
fall heavily or suddenly; decline markedly	get sick
fall or sink heavily	be the essential element
assume a drooping posture or carriage	criticize or reprimand harshly
fall in value	move downward and lower, but not necessarily all the way
	fall from clouds