certain vs sureness

certain is not a noun while sureness is a noun.

Word	Noun	Adjective	Verb	Adverb
certain	No	Yes	No	No
sureness	Yes	No	No	No

certain (noun)	sureness (noun)
	the quality of being steady and unfailing
	freedom from doubt; belief in yourself and your abilities

certain (adjective)	sureness (adjective)
established beyond doubt or question; definitely known
having or feeling no doubt or uncertainty; confident and assured
certain to occur; destined or inevitable
established irrevocably
exercising or taking care great enough to bring assurance
definite but not specified or identified
reliable in operation or effect