plurals of words ending in 'y'

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Across
  1. 3. very young children
  2. 5. something to do to keep you busy
  3. 7. more than one adult female
  4. 8. things which are not understood and need solving
  5. 9. people who are trying to cause you harm
Down
  1. 1. devices used to store electricity
  2. 2. things which have been found out by someone
  3. 3. adult caterpillars
  4. 4. groups of humans who live together
  5. 6. gatherings of people to celebrate an event