Solve the following crossword puzzle by filling in the antonyms of the given words.

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Across
  1. 4. Temporary
  2. 5. Poor
  3. 8. Smooth
  4. 9. Strict
Down
  1. 1. Artificial
  2. 2. Smile
  3. 3. Superior
  4. 4. Reward
  5. 6. Innocent
  6. 7. Defend