The Oxford Thesaurus An A-Z Dictionary of Synonyms - calamityn.

1) disaster, destruction, ruin, catastrophe, cataclysm, devastation, tragedy, misadventure, mischance, mishap: Calamity befell the town when it was engulfed in a landslide. 2) distress, affliction, trouble, hardship, misery, tragedy, misfortune, adversity, reverse, ruin, ruination, desolation, wretchedness: So full is the world of calamity that every source of pleasure is polluted.