What's the Plural?

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Across
  1. 1. mouse
  2. 4. bus
  3. 6. knife
  4. 8. leaf
  5. 10. dance
  6. 11. apple
  7. 12. pen
  8. 13. woman
Down
  1. 2. cat
  2. 3. kiss
  3. 4. book
  4. 5. child
  5. 7. sheep
  6. 9. hat
  7. 14. man