uncertain vs self-assurance

uncertain is not a noun while self-assurance is a noun.

Word	Noun	Adjective	Verb	Adverb
uncertain	No	Yes	No	No
self-assurance	Yes	No	No	No

uncertain (noun)	self-assurance (noun)
	freedom from doubt; belief in yourself and your abilities

uncertain (adjective)	self-assurance (adjective)
not established beyond doubt; still undecided or unknown
lacking or indicating lack of confidence or assurance
not certain to occur; not inevitable
not established or confirmed
ambiguous (especially in the negative)
not consistent or dependable
subject to change