Roget's Thesaurus of English Words and Phrases by Peter Mark Roget

473. Improbability — N. improbability, unlikelihood; unfavorable

chance, bad chance, ghost of a chance, little chance, small chance, poor chance, scarcely any chance, no chance; bare possibility; long odds; incredibility &c 485. V. be improbable &c adj.; have a small chance &c n.. Adj. improbable, unlikely, contrary to all reasonable expectation; wild [Coll.], far out [Coll.], out of sight [Coll.], outtasight [Coll.], heavy [Coll.]. rare &c (infrequent) 137; unheard of, inconceivable; unimaginable, inimaginable†; incredible &c 485; more than doubtful; strange, bizarre (uncomformable) 83. Phr. the chances are against; aquila non capit muscas [Lat.]; pedir peras pal olmo [Lat.].