2
disgraceful(adjective, disrepute)
2
disloyal(adjective, false, dishonest, deceitful, unreliable)
2
distrustful
2
doubt(noun, verb)
2
errant
2
erroneous(adjective, unpredictable, fickle, variable, undependable)
2
exceptionable(adjective, certain)
2
fair-weather(adjective, dishonest, deceitful, unreliable, insecure)
2
fanciful(adjective, doubtful, unlikely, implausible)
2
faulty(adjective, weak, frail, imperfect)
2
fraudulent
2
generalized(unclear, indistinct, indistinguishable)
2
hairy
2
hallucinatory(adjective, unpredictable, fickle, variable, undependable)
2
hazy(uncertain, doubtful, shaky, vague, hesitant)
2
immoral(corrupt, coarse, vulgar, dishonest, indecent)
2
imprecise(adjective, rough, vague, unclear, ambiguous)
2
impugnable(shaky, unlikely, unpromising)
2
inaccurate(adjective, rough, vague, unpredictable, fickle)
2
inadequate
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APASmart Define. (2015). questionable thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/questionable/thesaurus/synonyms
ChicagoSmart Define. 2015. "questionable thesaurus" https://smartdefine.org/questionable/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, questionable thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/questionable/thesaurus/synonyms>.
MLASmart Define. "questionable thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/questionable/thesaurus/synonyms>