de-escalation vs decrease

de-escalation and decrease both are nouns.

Word	Noun	Adjective	Verb	Adverb
de-escalation	Yes	No	No	No
decrease	Yes	No	Yes	No

As nouns, decrease is a hypernym of de-escalation; that is, decrease is a word with a broader meaning than de-escalation:

Other hypernyms of de-escalation include diminution, reduction, step-down.

de-escalation (noun)	decrease (noun)
(war) a reduction in intensity (of a crisis or a war)	the act of decreasing or reducing something
	the amount by which something decreases
	a change downward
	a process of becoming smaller or shorter

de-escalation (verb)	decrease (verb)
	decrease in size, extent, or range
	make become smaller