Plural of nouns

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Across
  1. 2. Plural of box
  2. 5. Plural of potato
  3. 7. Plural of finger
  4. 8. Plural of Tooth
Down
  1. 1. Plural of house
  2. 3. Plural of Snakes
  3. 4. Plural of story
  4. 6. Plural of knife