Changing y to -ie

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Across
  1. 2. Observed secretly; caught sight of
  2. 4. Attempted to do something
  3. 8. Young offspring of dogs
  4. 13. Things remembered from the past
  5. 14. Happening before the expected or present time
  6. 15. Most beautiful or delightful
  7. 16. Large towns like New York, London, or Tokyo
  8. 17. Moved or acted with speed
  9. 18. Tales or narratives
Down
  1. 1. Small breeds of horses
  2. 3. Gatherings for celebration
  3. 5. The state of being joyful or content
  4. 6. Moves through the air; also, common buzzing insects
  5. 7. Moved something from one place to another
  6. 9. Sheds tears or shouts out loudly
  7. 10. Coins worth one cent each
  8. 11. Stated that something is not true
  9. 12. Very young children or infants