Opposites

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Across
  1. 3. producing or capable of producing much noise
  2. 5. the cost incurred in or required for something
  3. 8. with opposite sides or surfaces that are far or relatively far apart
Down
  1. 1. of a size that is less than normal or usual
  2. 2. making little or no noise
  3. 4. of great weight; difficult to lift or move
  4. 6. moving or operating, or designed to do so, only at a low speed
  5. 7. of considerable size or extent