SINGLE TO PLURAL (Irregular plural nouns)

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Across
  1. 3. analysis
  2. 6. bacterium
  3. 8. phenomenon
  4. 10. spacecraft
Down
  1. 1. wife
  2. 2. fungus
  3. 4. sheep
  4. 5. mouse
  5. 7. tooth
  6. 9. hero