1. (noun) anything that happens suddenly or by chance without an apparent cause

• chance event
• fortuity
• stroke

1. (noun) an unfortunate mishap; especially one causing damage or injury

• accidental injury
• injury
• casualty
• fatal accident
• collision
• crash
• wreck
• shipwreck
• wreck

2. (noun) anything that happens suddenly or by chance without an apparent cause

• break
• good luck
• happy chance
• coincidence
• happenstance
• hap
• lottery

1. (noun) an unfortunate mishap; especially one causing damage or injury

• misadventure
• mischance
• mishap

2. (noun) anything that happens suddenly or by chance without an apparent cause

• happening
• natural event
• occurrence
• occurrent

1. (noun) anything that happens suddenly or by chance without an apparent cause

• accidental
• inadvertent