accident, accidentality, actuarial calculation, adventitiousness, adventure, break, casualness, casualty, chance, chance hit, contingency, contingent, destiny, fate, fluke, flukiness, fortuitousness, fortune, freak accident, gamble, good fortune, good luck, hap, happening, happenstance, happy chance, hazard, heedless hap, how they fall, indeterminacy, indeterminateness, law of averages, long odds, long shot, lot, luck, lucky shot, moira, opportunity, principle of indeterminacy, probability, problematicness, random sample, risk, run of luck, serendipity, statistical probability, the breaks, theory of probability, uncertainty, uncertainty principle, whatever comes

For further exploring for "fortuity" in Webster Dictionary Online

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