Synonyms for Dubious:
infamous, shifty, questionable, notorious, disreputable, ribald, contemptible, dishonorable, shady, louche, risque, nefarious.
problematic, untrustworthy, undecided, dubitable, undependable, skeptical, shady, uncertain, chancy, indecisive, unconvinced, unclear, unsure, hesitant, unreliable, suspect, iffy, suspicious, questionable.
poppycock, weird, crazy, silly, ridiculous, laughable, eccentric, bizarre, nonsensical, oddball, comical, preposterous, curious, outlandish, outrageous, grotesque, farcical, foolish, ludicrous, absurd, incredible.
unbelieving, doubtful, cynical, skeptical, suspicious, incredulous.
unreliable, questionable, undependable, untrustworthy.
•vague, unclear (adjective)
n.questioning, inclined to think/believe/agree etc., bewildered, sceptical. suspect, deceitful, unprincipled, cunning, fraudulent, corrupt, devious, unscrupulous, dishonest, untruthful. opposed, vice versa, conflicting, reverse, opposite, otherwise, certain, undecided, to the contrary, conversely, paradoxical. indecisive, clear, problematic, chancy, inconclusive, borderline, clouded, problematical, iffy, unclear. •doubtful (noun)
in question, questionable, incertain, dubitable, unsure, uncertain, doubtful, unconvinced.
deceitful, untruthful, chancy, questioning, devious, dishonest, bewildered, unscrupulous, unprincipled, clouded, fraudulent. iffy, unclear, cunning, inconclusive, problematical. indecisive, problematic. borderline. corrupt. •undetermined
•Other relevant words:
hesitant, chancy, indecisive, unsure, unconvinced, paradoxical, corrupt, questioning, unclear, fraudulent, sceptical, clouded, iffy, borderline, in question, undecided, inconclusive, unprincipled, unscrupulous, dubitable, incertain, devious, problematic, uncertain, problematical, suspect, dishonest.