disaster

/dɪˈzæstər/
noun
  1. A sudden event that causes great damage, loss, or suffering, such as a flood, earthquake, or fire.
    • Emergency teams responded quickly to the natural disaster.
    • The flood was the worst disaster the region had ever seen.
    • The earthquake was a disaster that destroyed thousands of homes.
  2. A very bad or unsuccessful situation or event.
    • The picnic turned into a disaster when it started raining heavily.
    • His first attempt at baking a cake was a complete disaster.
    • The school play was a disaster because the lead actor forgot all his lines.