Crossword: plural of nouns

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Across
  1. 5. life
  2. 8. thief
  3. 9. ship
  4. 10. tooth
  5. 11. foot
  6. 13. age
Down
  1. 1. country
  2. 2. folder
  3. 3. conversation
  4. 4. boat
  5. 6. child
  6. 7. mouse
  7. 12. diary