uncertain vs dubious

uncertain and dubious both are adjectives.

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

uncertain (adjective)	dubious (adjective)
not established beyond doubt; still undecided or unknown	open to doubt or suspicion
lacking or indicating lack of confidence or assurance	fraught with uncertainty or doubt
not certain to occur; not inevitable	not convinced
not established or confirmed
ambiguous (especially in the negative)
not consistent or dependable
subject to change