Questionable
Controversial
Synonyms: Controversial, open to question, in doubt, dubious, unsure, in dispute, arguable, problematical, unprovable, unsettled, equivocal, implausible, not definite, not obvious, spurious, marginal, iffy, contentious, open to doubt, doubtful, uncertain, debatable, in question, problematic, unverified, unresolved, undecided, unconvincing, improbable, unclear, apocryphal, borderline, moot, and dodgy.
Suspicious
Synonyms: Suspicious, under suspicion, dubious, odd, not quite right, murky, shifty, disreputable, potentially illegal, fishy, iffy, suspect, irregular, doubtful, strange, mysterious, dark, unsavoury, potentially dishonest, funny, shady, and dodgy.
Example Sentences
The source of that information is questionable.
His motives for helping seemed questionable.
The company’s accounting practices were questionable.
They made a questionable decision during the meeting.
The quality of the product is somewhat questionable.
She raised a questionable point about the report.
The evidence provided was questionable at best.
His behavior was questionable under the circumstances.
The contract terms appeared questionable to the lawyers.
The origin of the artifact is questionable.