Questionable antonyms | adjectives

Antonyms for Questionable as a Adjective

• unquestionable

  doubtful
• certain

  dubious, doubtful
• incontrovertible

  dubious, doubtful
• indisputable

  dubious, doubtful
• sure

  unquestionable, doubtful
• undoubted
• clear
• definite
• incontestable
• undeniable
• positive
• indubitable
• unarguable
• trustworthy
• trusty
• indubious
• unequivocal

  dubious
• decisive
• definitive
• believable
• credible
• plausible
• irrefutable
• absolute
• conclusive
• likely
• probable
• accomplished
• inarguable
• irrefragable
• unanswerable
• unchallengeable
• proven
• obvious
• conceivable
• imaginable
• liable
• unambiguous
• undisputed
• hands-down
• questionless
• unproblematic
• settled
• undebatable
• straightforward

  dubious
• authoritative
• open-and-shut
• earthly
• possible
• potential