excusatory vs excuse

excusatory is not a noun while excuse is a noun.

Word	Noun	Adjective	Verb	Adverb
excusatory	No	Yes	No	No
excuse	Yes	No	Yes	No

excusatory (noun)	excuse (noun)
	a poor example
	a defense of some offensive behavior or some failure to keep a promise etc.
	a note explaining an absence

excusatory (adjective)	excuse (adjective)
offering or expressing apology

excusatory (verb)	excuse (verb)
	accept an excuse for
	defend, explain, clear away, or make excuses for by reasoning
	excuse, overlook, or make allowances for; be lenient with
	serve as a reason or cause or justification of
	grant exemption or release to
	ask for permission to be released from an engagement