doubtable
Open to suspicion
Doubtable means capable of being doubted or open to question.
The word is rare, with *doubtful* and *questionable* serving most contexts where it might appear: The authenticity of the document is doubtable, but we proceeded anyway.
Believe to be likely
- iffyUncertain, questionable
- suspiciousInclined to distrust
- unreliableNot consistently performing
- untrustworthyNot deserving of confidence
unconvincing · implausible · fishy · shady · sketchy · disputable · contestable · challengeable
Lacking confidence or certainty
- tentativeUncertain and provisional
- unclearNot easily understood
- indefiniteNot precisely determined
- undeterminedNot yet established
unresolved · undecided · inconclusive · ambiguous · equivocal · indeterminate · unprovable · open-ended
Rejection of truth claims
- incredulityInability to accept something
- mistrustLack of faith
- distrustAbsence of confidence
- warinessCautious distrust
suspicion · misgiving · reservation · qualm · hesitation · second-guessing · questioning · scrutiny
suspect
Believe to be likely
- iffyUncertain, questionable
- suspiciousInclined to distrust
- unreliableNot consistently performing
untrustworthy · unconvincing · implausible · fishy · shady · sketchy · disputable · contestable · challengeable · impeachable
unsure
Lacking confidence or certainty
- tentativeUncertain and provisional
- unclearNot easily understood
- indefiniteNot precisely determined
undetermined · unresolved · undecided · inconclusive · ambiguous · equivocal · indeterminate · unprovable · open-ended · pending
disbelief
Rejection of truth claims
- incredulityInability to accept something
- mistrustLack of faith
- distrustAbsence of confidence
wariness · suspicion · misgiving · reservation · qualm · hesitation · second-guessing · questioning · scrutiny · cynicism
doubtableindubitable
Impossible to doubt
undoubtable · unquestionable · indisputable · undeniable · certain