Making words that end in f or fe plural

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Across
  1. 4. the flat covers of houses
  2. 5. baby cows
  3. 7. keep people's necks warm in winter
  4. 8. sharp tools used to cut
  5. 9. married women
  6. 11. people who cook food in a restaurant
Down
  1. 1. high rocks with a steep drop
  2. 2. a baker sells these
  3. 3. fall off trees in autumn
  4. 5. people in charge
  5. 6. people who steal
  6. 10. Christmas elves sit on these