Saying the opposites

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Across
  1. 3. unkind
  2. 5. encourage
  3. 7. safe
  4. 8. mature
  5. 10. plausible
  6. 11. innocent
  7. 12. poor
  8. 14. stupid
  9. 15. normal
Down
  1. 1. defeat
  2. 2. possible
  3. 3. fake
  4. 4. calm
  5. 5. simple
  6. 6. optimistic
  7. 9. tiny
  8. 13. happiness