List of impossible synonyms and impossible related words.
I refuse, I will not, absurd, algorismic, algorithmic, aliquot, antic, barred, by no means, cardinal, closed-out, contrary to reason, count me out, crazy, cureless, decimal, differential, digital, even, exceptionable, excluded, exponential, fanciful, fantastic, farcical, figural, figurate, figurative, finite, fractional, hopeless, illogical, imaginary, immedicable, impair, impracticable, impractical, inadmissible, include me out, incomprehensible, inconceivable, incredible, incurable, indefensible, infeasible, infinite, integral, intolerable, irrational, irremediable, irreparable, logarithmic, logically impossible, logometric, ludicrous, negative, no, no go, not likely, not possible, nothing doing, numeral, numerary, numerative, numeric, objectionable, odd, ordinal, outlandish, outrageous, oxymoronic, pair, paradoxical, positive, possible, preposterous, prime, prohibited, radical, rational, real, reciprocal, ridiculous, ruled-out, self-contradictory, submultiple, surd, transcendental, unacceptable, unaccountable, unachievable, unattainable, unbelievable, uncorrectable, undesirable, unexpected, unfeasible, unimaginable, unobtainable, unrealizable, unreasonable, unsolvable, unsuitable, untenable, unthinkable, unworkable, weird