40 entries under shaky topic. ×

33
unlikely(adjective, slight, extraordinary, strange, superb)
4
dubitable(adjective, uncertain, doubtful, unsure)
4
unpromising
2
ambiguous(adjective, unlikely, unpromising)
2
debatable(adjective, uncertain, doubtful, unsure)
2
doubtable(unlikely, unpromising)
2
iffy(adjective, uncertain, doubtful, likely)
2
problematic(adjective, uncertain, unreasonable, doubtful)
2
shady(uncertain, doubtful, unsure, unlikely)
1
chancy(uncertain, doubtful, unsure, unlikely)
1
inconclusive(adjective, open, obscure, poor, thin)
1
obscure(unreasonable, dubious, unlikely, flimsy)
1
open(uncertain, doubtful, unsure, unlikely)
1
speculative(wild, unreasonable, useless, absurd)
1
unclear(uncertain, doubtful, unsure, unlikely)
0
borderline(unlikely, unpromising)
0
clouded(unlikely, unpromising)
0
contingent(unlikely, unpromising)
0
dicey(unlikely, unpromising)
0
disreputable(unlikely, unpromising)
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APASmart Define. (2015). improbable thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/improbable/thesaurus/synonyms
ChicagoSmart Define. 2015. "improbable thesaurus" https://smartdefine.org/improbable/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, improbable thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/improbable/thesaurus/synonyms>.
MLASmart Define. "improbable thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/improbable/thesaurus/synonyms>