apocalypse
noun
°The end of life on earth or all.
"The deteriorating ecology of the planet leads many scientists to believe we are nearing an apocalypse."
°An event with very serious consequences.
"We need to reorganise the mortgage in the light of the looming financial apocalypse."
synonyms: armageddon, doomsday, judgement day, nuclear holocaust more» , ragnarok, final judgment, end times