Antonyms in English

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Across
  1. 2. gentle
  2. 3. attack
  3. 6. modern
  4. 9. internal
  5. 10. add
  6. 11. descend
  7. 12. notice
  8. 14. depart
  9. 15. supply
Down
  1. 1. innocent
  2. 4. accept
  3. 5. change
  4. 7. different
  5. 8. combine
  6. 13. conceal