de-escalation vs de-escalate

de-escalation is a noun but de-escalate is not a noun.

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

de-escalation (noun)	de-escalate (noun)
(war) a reduction in intensity (of a crisis or a war)

de-escalation (verb)	de-escalate (verb)
	reduce the level or intensity or size or scope of
	diminish in size, scope, or intensity