Accident
From Tardis Wiki, the free Doctor Who reference
A few months prior to March 2005, there was an industrial accident at the council where Pete Lambert, which was "hushed up". (PROSE: Have You Seen This Man?)
Having become pregnant unintentionally, Cathy Salt described her unborn child as a "nice accident". (TV: Boom Town)
The deaths of the PM and his Cabinet (PROSE: Mars) in 2006 at the hands of the Slitheen family (TV: Aliens of London, World War Three) were covered up as accidents. (PROSE: Mars)