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

143 entries under adjective topic. ×

8
flimsy(poor, thin, informal, unreasonable)
8
remote(doubtful, dubious)
8
tall
8
thin(weak, great, poor, extraordinary)
8
unrealistic(wild, unreasonable, fantastic, useless)
6
farfetched(unreasonable, dubious, unlikely, flimsy)
6
marvellous
6
ridiculous(unbelievable, implausible)
5
preposterous(extraordinary, fantastic, amazing, unbelievable)
5
rare(extraordinary, strange, doubtful, dubious)
5
strange(extraordinary, fantastic, doubtful, dubious)
5
unsubstantial(thin, extraordinary, strange, unreasonable)
4
dubitable(uncertain, doubtful, shaky, unsure)
4
impractical(silly, unreasonable, unlikely, unrealistic)
4
peculiar
4
terrific(great, excellent, superb, super)
3
crazy
3
illogical(poor, wild, unreasonable, fantastic)
3
insane
3
ludicrous
For more, visit Improbable on Power Thesaurus
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>