Opposites

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Across
  1. 4. replenish
  2. 8. inflate
  3. 10. illuminate
  4. 11. disappear
  5. 12. afterwards
  6. 13. fail
  7. 15. switch off
  8. 16. install
  9. 17. release
  10. 18. disassemble
Down
  1. 1. initiate
  2. 2. tighten
  3. 3. land
  4. 5. installation
  5. 6. decrease
  6. 7. extend
  7. 9. trailing ____
  8. 14. above