Crossword clues for the word: CATACLYSM The word CATACLYSM has appeared as an answer to at least 5 crossword clues on different crossword puzzles. Crossword clues for CATACLYSM Showing 1 to 5 of 5 results Clue(s) Disaster Large-scale disaster Social or political upheaval. What M. learned Word from the Greek for the Genesis Flood