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Definition of cataclysm:

  1. An extensive overflow or sweeping flood of water; a deluge.
  2. Any violent catastrophe, involving sudden and extensive changes of the earth's surface.


help, flood, alluvion, denouement, disaster, cataract, sequel, revolution, tragedy, big, inundation, convulsion, overflow, freshet, misfortune, deluge, change, downpour, mischance, disturbance, torrent, Niagara, study at disaster, upheaval, calamity, mishap, catastrophe, spate.

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