collapsible vs folding

collapsible is not a noun while folding is a noun.

Word	Noun	Adjective	Verb	Adverb
collapsible	No	Yes	No	No
folding	Yes	Yes	No	No

collapsible (noun)	folding (noun)
	the act of folding
	the process whereby a protein molecule assumes its intricate three-dimensional shape
	a geological process that causes a bend in a stratum of rock

collapsible (adjective)	folding (adjective)
capable of collapsing or being collapsed	capable of being folded up and stored