3
questionable(shaky, unlikely, unpromising)
2
debatable(shaky, unlikely, unpromising)
2
doubtful(adjective, open, obscure, delicate, uncertain)
1
ambiguous(adjective, delicate, uncertain, unstable, doubtful)
1
arguable
1
borderline(adjective, delicate, uncertain, unstable, doubtful)
1
chancy(adjective, delicate, uncertain, unstable, doubtful)
1
clouded(shaky, unlikely, unpromising)
1
contestable
1
contingent(adjective, delicate, uncertain, unstable, doubtful)
1
contradictable
1
dangerous(adjective, delicate, uncertain, unstable, doubtful)
1
delicate(adjective, uncertain, unstable, doubtful, unsettled)
1
dicey(adjective, delicate, uncertain, unstable, doubtful)
1
disputable
1
disreputable(shaky, unlikely, unpromising)
1
doubtable(doubtful, shaky, risky, unlikely, unpromising)
1
dubious(adjective, open, delicate, uncertain, unstable)
1
dubitable(shaky, unlikely, unpromising)
1
dynamite(adjective, delicate, uncertain, unstable, doubtful)
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APASmart Define. (2013). impugnable thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/impugnable/thesaurus/synonyms
ChicagoSmart Define. 2013. "impugnable thesaurus" https://smartdefine.org/impugnable/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2013, impugnable thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/impugnable/thesaurus/synonyms>.
MLASmart Define. "impugnable thesaurus" 28 June 2013. Web. 20 September 2026. <https://smartdefine.org/impugnable/thesaurus/synonyms>