Collective nouns

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Across
  1. 2. A ______ of puppies.
  2. 7. A ______ of keys.
  3. 8. A ______ of books.
  4. 9. A ______ of flowers.
  5. 11. A ______ of fish.
Down
  1. 1. A ______ of ships.
  2. 3. A ______ of bees.
  3. 4. A ______ of fish.
  4. 5. A ______ of lions.
  5. 6. A ______ of pearls.
  6. 10. A ______ of stars.
  7. 12. A ______ of mountains.