contingent vs uncertain

contingent is a noun but uncertain is not a noun.

Word	Noun	Adjective	Verb	Adverb
contingent	Yes	Yes	No	No
uncertain	No	Yes	No	No

contingent (noun)	uncertain (noun)
a temporary military unit
a gathering of persons representative of some larger group

contingent (adjective)	uncertain (adjective)
being determined by conditions or circumstances that follow	not established beyond doubt; still undecided or unknown
possible but not certain to occur	lacking or indicating lack of confidence or assurance
uncertain because of uncontrollable circumstances	not certain to occur; not inevitable
	not established or confirmed
	ambiguous (especially in the negative)
	not consistent or dependable
	subject to change