disappoint vs disappointment

disappoint is not a noun while disappointment is a noun.

Word	Noun	Adjective	Verb	Adverb
disappoint	No	No	Yes	No
disappointment	Yes	No	No	No

disappoint (noun)	disappointment (noun)
	an act (or failure to act) that disappoints someone
	a feeling of dissatisfaction that results when your expectations are not realized

disappoint (verb)	disappointment (verb)
fail to meet the hopes or expectations of