dubious vs uncertain

dubious and uncertain both are adjectives.

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

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