disappear vs disappearing

disappear is not a noun while disappearing is a noun.

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

disappear (noun)	disappearing (noun)
	the act of leaving secretly or without explanation

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