deterioration vs slump

deterioration and slump both are nouns.

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

As nouns, slump is a hyponym of deterioration; that is, slump is a word with a more specific, narrower meaning than deterioration:

Other hyponyms of deterioration include drop-off, falling off, falloff, slack.

deterioration (noun)	slump (noun)
process of changing to an inferior state	a noticeable deterioration in performance or quality
a symptom of reduced quality or strength	a long-term economic state characterized by unemployment and low prices and low levels of trade and investment

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