uncertain vs chancy

uncertain and chancy both are adjectives.

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

uncertain (adjective)	chancy (adjective)
not established beyond doubt; still undecided or unknown	of uncertain outcome; especially fraught with risk
lacking or indicating lack of confidence or assurance	subject to accident or chance or change
not certain to occur; not inevitable
not established or confirmed
ambiguous (especially in the negative)
not consistent or dependable
subject to change