Singular to plural

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Across
  1. 3. feet
  2. 4. tomatoes
  3. 5. babies
  4. 6. sheep
  5. 9. cats
  6. 10. fish
  7. 12. mice
  8. 14. dogs
  9. 15. women
Down
  1. 1. cities
  2. 2. houses
  3. 3. feet
  4. 7. potatoes
  5. 8. rivers
  6. 9. children
  7. 11. buses
  8. 12. men
  9. 13. boxes