10/18 Crossword

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Across
  1. 3. The daughter of one's sister or brother
  2. 4. Flawless and without error
  3. 7. One who grows and sells flowers
  4. 8. A fake name a person uses to hide his true identity
  5. 10. The breathing organs of a fish
  6. 11. A light fall of rain
  7. 12. Involving risk or peril
  8. 13. The heavy metal covering worn by knights
  9. 15. Spoken rather than written
  10. 17. A precious stone of a deep shade of green
  11. 19. A kind of melon
  12. 20. At the present time
  13. 21. The alphabet for the blind consisting of raised dots
Down
  1. 1. Moving stairs in a department store or airport
  2. 2. A happening from time to time; infrequent
  3. 4. The residence of a king and queen
  4. 5. Talk between two people
  5. 6. Untrue or wrong
  6. 9. A long car used for formal events
  7. 10. A silly nervous laugh
  8. 14. A place where collections of works of art are displayed
  9. 16. A man who is not and has not been married
  10. 18. To learn by heart; to code and retain information