AVALANCHE

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Across
  1. 2. of falling snow on a mountain
  2. 3. fall
  3. 5. influx, as of fan mail
  4. 6. snow mass
  5. 8. mass of snow sliding fast
Down
  1. 1. fall of snow
  2. 2. snow fall
  3. 4. and rock slide
  4. 7. snow-slip