-cei & -ie

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Across
  1. 1. to be aware of
  2. 5. to e unfaithful to someone/a group
  3. 8. to accomplish
  4. 9. a written acknowledgement of having received
  5. 10. the act of deceiving
Down
  1. 2. to form
  2. 3. to take into one's possession
  3. 4. to bring back
  4. 6. the act of teasing/annoying; the act of causing trouble
  5. 7. the science that deals with the preservation of health