insoluble vs insolubility

insoluble is not a noun while insolubility is a noun.

Word	Noun	Adjective	Verb	Adverb
insoluble	No	Yes	No	No
insolubility	Yes	No	No	No

insoluble (noun)	insolubility (noun)
	the quality of being insoluble and difficult to dissolve in liquid
	the property (of a problem or difficulty) that makes it impossible to solve

insoluble (adjective)	insolubility (adjective)
(of a substance) incapable of being dissolved
admitting of no solution or explanation
without hope of solution