Plural and singular nouns

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Across
  1. 4. baby
  2. 6. money
  3. 7. dog
  4. 11. tomato
  5. 12. ceiling
  6. 13. man
  7. 15. fish
  8. 17. tooth
Down
  1. 1. cat
  2. 2. foot
  3. 3. person
  4. 5. bus
  5. 8. gate
  6. 9. music
  7. 10. water
  8. 12. car
  9. 14. time
  10. 16. house
  11. 17. traffic