Haunted House

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Across
  1. 1. to light up
  2. 3. lasting for a while
  3. 5. a crowd
  4. 6. to go down
  5. 9. something to desire to become
  6. 13. not easy to touch
  7. 14. causing no harm
  8. 17. a gas surrounding earth
  9. 18. light and airy
  10. 19. a quick trip
  11. 20. a ghost
Down
  1. 2. of a title or rank
  2. 4. to become aware of
  3. 7. to balance yourself
  4. 8. can be seen
  5. 10. a thick exhalation that is visible
  6. 11. a bottomless hole
  7. 12. a disturbance
  8. 15. holding land
  9. 16. a strong feeling