Use 'derailment' for actual train accidents, not metaphorically for minor inconveniences in plans. News headline: 'Major derailment in subway line disrupts morning commute.'
Pro Tip 2/3
Seriousness Implied
'Derailment' indicates a serious accident, often with extensive damage and potential for injuries. Sadly, the derailment resulted in several casualties.
Pro Tip 3/3
Technical Discussions
In technical contexts, 'derailment' can involve discussing causes and prevention measures. The engineers analyzed the derailment to improve railway safety.