Synonyms of 'doubtful'

absurd, agnostic, ambiguous, amoral, arguable, borderline, clouded, conjectural, contestable, contingent, corrupt, criminal, crooked, dark, debatable, devious, dishonest, dishonorable, disputable, disreputable, distrustful, dubious, dubitable, equivocal, evasive, felonious, fishy, fraudulent, hazy, hesitant, iffy, ill-gotten, immoral, implausible, improbable, inconceivable, incredible, incredulous, indeterminate, indirect, insecure, insidious, mistakable, mistrustful, moot, obscure, open, precarious, preposterous, problematic, queasy, questionable, questioning, ridiculous, Rocky, rotten, sceptical, scrupulous, shady, shaky, shameless, shifty, shy, sinister, skeptic, skeptical, slippery, speculative, suspect, suspicious, tall, thick, deniable, controversial, chancy, leery, indefinite, indecisive, thin, touch-and-go, treacherous, tricky, unbelievable, uncertain, unclear, unconscionable, unconvinced, unconvincing, undecided, undependable, underhand, underhanded, unearthly, uneasy, ungodly, unhealthy, unimaginable, unlikely, unpredictable, unprincipled, unpromising, unreliable, unresolved, unsafe, unsavory, unscrupulous, unsettled, unsound, unstable, unsteady, unsure, unthinkable, untrustworthy, vague, wary