Synonyms and related words :
accidentality, actuarial calculation, adventitiousness, blessing, break, casualness, chance, destiny, fate, felicity, flukiness, fortuitousness, fortuity, fortunateness, fortune, gamble, good fortune, good luck, hap, happenstance, happy chance, happy fortune, heedless hap, how they fall, indeterminacy, indeterminateness, law of averages, lot, luck, luckiness, moira, opportunity, principle of indeterminacy, probability, problematicness, random sample, risk, run of luck, serendipity, smiles of fortune, statistical probability, the breaks, theory of probability, uncertainty, uncertainty principle, whatever comes