3
underhand(adjective, evil, corrupt, dishonest, irregular)
3
unethical
3
unsatisfactory
3
vacillating(adjective, doubtful, vague, hesitant, unpredictable)
2
beyond belief(expression, extraordinary, amazing, absurd, implausible)
2
confused(adjective, uncertain)
2
contemptible(adjective, disreputable)
2
contested(adjective, certain)
2
contingent(adjective, uncertain, doubtful, shaky, vague)
2
corrupt
2
crafty
2
crazy(adjective, unusual, strange, unexpected)
2
criminal
2
dangerous
2
deceptive(adjective, weak, unpredictable, frail, fickle)
2
delusive(adjective, unpredictable, fickle, variable, undependable)
2
derogatory
2
despicable(adjective, disrepute)
2
dickey(adjective, unreliable, insecure, treacherous, incalculable)
2
dicky(adjective, unreliable, insecure, treacherous, incalculable)
11 years ago|31k views|share |citing 
APASmart Define. (2015). questionable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/questionable/thesaurus/synonyms
ChicagoSmart Define. 2015. "questionable thesaurus" https://smartdefine.org/questionable/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, questionable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/questionable/thesaurus/synonyms>.
MLASmart Define. "questionable thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/questionable/thesaurus/synonyms>