143 entries under adjective topic. ×

2
strained
2
unapt(doubtful, likely)
2
unconceivable(likely, implausible)
2
unreal(wild, unreasonable, absurd, abstract)
2
unusable(wild, unreasonable, useless, absurd)
2
unworkable(wild, silly, unreasonable, useless)
2
weird
1
beyond belief(expression, extraordinary, amazing, unbelievable)
1
deficient(flat, poor, thin, small)
1
dissimilar
1
enigmatic
1
fantastical
1
fictitious
1
fishlike
1
hundred-to-one(doubtful, likely, unlikely, implausible)
1
inadequate(poor, thin, false, shallow)
1
inconclusive(open, obscure, poor, thin)
1
inept(poor, thin, false, inadequate)
1
lame(flat, poor, thin, false)
1
miraculous
11 years ago|10k views|share |citing 
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>