Synonyms of dubious

1 Syllable

shying, queer, moot

2 Syllables

queerer, vaguest, queerest, iffy, vaguer, faithless, wiggly, southpaw, clouded, tenuous, doubting, shady, muzzy, open, suspect, mooter, muzzier, chancy, show-me, trustless, doubtful, unclear, fishy, leery

3 Syllables

erratic, tottery, handed-down, untrusting, dithering, tottering, mistrustful, arguable, unproven, suspicious, alleged, unsure, hesitant, far-fetched, precarious, distrustful, ambiguous, farfetched, unstable, figmental, reluctant, doubtable, skeptical, left-handed, lefthanded, mootable, untrusty, perplexed, fly-by-night, wavering, uncertain, diffident

4 Syllables

untrustworthy, implausible, questionable, unreliable, unhistoric, debateable, debatable, incredulous, problematic, disputable, dubitable, unconfirmed, legendary, apocryphal, controversial, nonbelieving, unsupported, multivocal, polysemous, improbable, unspecific, disinclined, inexplicit, unassured, prerelease, pre-release, ambilevous, unconvinced, equivocal, contestable, unbelieving, impugnable, unconverted, unlikely, undecided

5 Syllables

unhistorical, unverifiable, controvertible, problematical, hundred-to-one, indefinite, unbelievable, undependable, unsubstantiated, unconceivable, indecisive

6 Syllables

indeterminable, unauthenticated