devalue vs decrease

devalue is not a noun while decrease is a noun.

Word	Noun	Adjective	Verb	Adverb
devalue	No	No	Yes	No
decrease	Yes	No	Yes	No

As verbs, decrease is a hypernym of devalue; that is, decrease is a word with a broader meaning than devalue:

Other hypernyms of devalue include diminish, fall, lessen.

devalue (noun)	decrease (noun)
	the act of decreasing or reducing something
	the amount by which something decreases
	a change downward
	a process of becoming smaller or shorter

devalue (verb)	decrease (verb)
lower the value or quality of	decrease in size, extent, or range
lose in value	make become smaller
remove the value from; deprive of its value