Opposites

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Across
  1. 3. something that is difficult
  2. 4. the opposite of dangerous
  3. 8. something that takes a long time
  4. 9. the opposite of loud
  5. 12. when something weighs a lot, like an airplane
  6. 13. when something does not weigh a lot, like a feather
  7. 15. when something is sanitary or organized
Down
  1. 1. something that has been around for a long time
  2. 2. something risky
  3. 5. the opposite of slow
  4. 6. something that makes a lot of noise
  5. 7. the opposite of clean
  6. 10. something that is not tall
  7. 11. something that is not difficult
  8. 13. the opposite of short
  9. 14. the opposite of old