Synonyms|451Antonyms|268|Broader|4Narrower|8Related|1.1k

81 entries under unbelievable topic. ×

1
unknowable(extraordinary, strange, implausible, unthinkable)
1
unsubstantial(extraordinary, strange, doubtful, implausible)
1
visionary(adjective, fantastic, imaginary, whimsical)
0
aerial(adjective, fantastic, imaginary, whimsical)
0
blue sky(expression, adjective, fantastic, imaginary)
0
capricious(adjective, strange, crazy, fantastic, insane)
0
castles in the air(expression, adjective, idiom, fantastic, imaginary)
0
chimerical(adjective, strange, fantastic, imaginary, weird)
0
curious(adjective, fantastic, imaginary, whimsical)
0
dreamlike(adjective, fantastic, imaginary, whimsical)
0
extravagant(adjective, strange, crazy, fantastic, insane)
0
fairy-tale(adjective, fantastic, imaginary, whimsical)
0
fancied(adjective, fantastic, imaginary, whimsical)
0
fantastical(adjective, fantastic, imaginary, whimsical)
0
fictional(adjective, strange, crazy, fantastic, insane)
0
fictive(adjective, fantastic, imaginary, whimsical)
0
flaky(adjective, fantastic, imaginary, whimsical)
0
floating(adjective, fantastic, imaginary, idealistic)
0
for the birds(expression, idiom, improbable)
0
full of holes(expression, idiom, improbable)
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APASmart Define. (2015). unlikely thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/unlikely/thesaurus/synonyms
ChicagoSmart Define. 2015. "unlikely thesaurus" https://smartdefine.org/unlikely/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, unlikely thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/unlikely/thesaurus/synonyms>.
MLASmart Define. "unlikely thesaurus" 14 April 2015. Web. 1 October 2026. <https://smartdefine.org/unlikely/thesaurus/synonyms>