1. CONSTANCY OF SEQUENCE IN EVENTS
[Absence of assignable cause.] Chance.
[Nouns] chance, indetermination, accident, fortune, hazard, hap, haphazard, chance medley, random, luck, raccroc, casualty, contingence, adventure, hit; fate (necessity) [more]; equal chance; lottery; tombola; toss up [more]; turn of the table, turn of the cards; hazard of the die, chapter of accidents, fickle finger of fate; cast of the dice, throw of the dice; heads or tails, flip of a coin, wheel of Fortune; sortes, sortes Virgilianae.
probability, possibility, odds; long odds, run of luck; accidentalness; main chance, odds on, favorable odds.
statistics, theory of Probabilities, theory of Chances; bookmaking; assurance; speculation, gaming [more].
[Adverbs] by chance, accidentally, by accident; casually; perchance (possibly) [more]; for aught one knows; as good would have it, as bad would have it, as luck would have it, as ill-luck would have it, as chance would have it; as it may be, as it may chance, as it may turn up, as it may happen; as the case may be.