Synonyms|527Antonyms|88|Broader|4Narrower|0Related|667

143 entries under adjective topic. ×

3
mad
3
not likely(expression, idiom, unreasonable, doubtful)
3
slight(flat, poor, thin, inadequate)
3
slim(slight, poor, thin, small)
3
uncertain(doubtful, unsure, likely, unlikely)
3
unreasonable(poor, thin, dubious, unlikely)
2
ambiguous(shaky, unlikely, unpromising)
2
debatable(uncertain, doubtful, shaky, unsure)
2
equivocal(uncertain, doubtful, unsure)
2
forced
2
grandiloquent
2
hard to believe(expression, idiom)
2
iffy(uncertain, doubtful, shaky, likely)
2
impracticable(wild, silly, unreasonable, doubtful)
2
incomprehensible(awful, strange, wonderful, fabulous)
2
legendary(mythical, fabled, mythological)
2
mysterious
2
paradoxical
2
problematic(uncertain, unreasonable, doubtful, shaky)
2
shaky(likely, unlikely, unpromising)
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APASmart Define. (2015). improbable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/improbable/thesaurus/synonyms
ChicagoSmart Define. 2015. "improbable thesaurus" https://smartdefine.org/improbable/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, improbable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/improbable/thesaurus/synonyms>.
MLASmart Define. "improbable thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/improbable/thesaurus/synonyms>