dependence on chance or on the fulfillment of a condition; uncertainty; fortuitousness

Nothing was left to contingency.

a contingent event; a chance, accident, or possibility conditional on something uncertain

He was prepared for every contingency.

something incidental to a thing.

noun

certainty , definiteness , reality , surety , truth

noun

accident , break , chance , crisis , crossroads , emergency , event , eventuality , exigency , fortuity , happening , if it’s cool , incident , juncture , likelihood , occasion , odds , opportunity , pass , pinch , predicament , probability , strait , turning point , uncertainty , zero hour * , accidentality , case , casualty , fortuitousness , peril , possibility , prospect , proviso , risk