Plural Forms

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Across
  1. 1. foot
  2. 5. nucleus
  3. 7. sheep
  4. 8. stimulus
  5. 9. thesis
  6. 11. mouse
  7. 13. year
  8. 14. crisis
  9. 15. life
Down
  1. 2. tooth
  2. 3. analysis
  3. 4. fish
  4. 6. person
  5. 10. series
  6. 12. company