prefix and suffix

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Across
  1. 2. prefix
  2. 4. submarine
  3. 5. misfire
  4. 6. fearless
  5. 9. interact
  6. 11. attraction
  7. 13. superstar
  8. 15. wooden
  9. 16. disagree
Down
  1. 1. kindness
  2. 3. comfortable
  3. 5. enjoyment
  4. 6. quickly
  5. 7. friendship
  6. 8. humor
  7. 10. extraodirary
  8. 12. nonsense
  9. 14. postpone
  10. 15. higher