Synonyms and Antonyms of doubtful
- he was doubtful about the decision to complete the project despite its mounting problems
distrustful, dubious, hinky [slang], mistrustful, skeptical, suspicious, trustless, uncertain, unconvinced, undecided, unsettled, unsure
- the election results were highly doubtful, so an investigation was begun
debatable, disputable, dodgy [chiefly British], doubtable, dubious, dubitable, equivocal, fishy, problematic (also problematical), queer, questionable, shady, shaky, suspect, suspicious
- our winning the championship increasingly looks like a doubtful outcome
- a doubtful claim to the property
controversial, debated, disputed
dubious, iffy, inconclusive, indecisive, problematic (also problematical), shaky, uncertain
academic (also academical), hypothetical, speculative, theoretical (also