accidentAccidents at work can sometimes result in serious injury.
mishapDue to a surgical mishap, she's lost the use of her left arm.
mischanceformalIt would be a great loss if, by some mischance, the message was never received.
misfortuneThey were beset by misfortunes their whole lives.
death by misadventureUKlawThe coroner recorded a verdict of death by misadventure.