disappearance vs disappear

disappearance is a noun but disappear is not a noun.

Word	Noun	Adjective	Verb	Adverb
disappearance	Yes	No	No	No
disappear	No	No	Yes	No

disappearance (noun)	disappear (noun)
the act of leaving secretly or without explanation
gradually ceasing to be visible
the event of passing out of sight
ceasing to exist

disappearance (verb)	disappear (verb)
	get lost, as without warning or explanation
	cease to exist
	become less intense and fade away gradually
	become invisible or unnoticeable