Unit 28 6th, DB

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Across
  1. 4. division
  2. 8. store
  3. 11. prefix
  4. 13. correct
  5. 14. mostly
  6. 15. same
  7. 16. bound
  8. 19. slave
  9. 20. nice
  10. 21. catchword
Down
  1. 1. ready
  2. 2. cooled water
  3. 3. underwater boat
  4. 5. graph
  5. 6. sub-board
  6. 7. mixture
  7. 9. group
  8. 10. sink
  9. 12. how much it can hold
  10. 17. water-ish
  11. 18. new