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Across
  1. 5. circumstances that form the setting for an event, statement, or idea
  2. 6. the action of repeating something.
  3. 7. something that is difficult or impossible to understand or explain.
  4. 10. the action of using something or the fact of being used.
  5. 14. a small booklet or leaflet.
  6. 15. provide someone with amusement or enjoyment.
  7. 16. the words of a song in popular music.
  8. 17. an unusual and exciting, typically hazardous, experience or activity.
Down
  1. 1. a plan for carrying out something.
  2. 2. the quality of a sound.
  3. 3. a distinguishing quality or characteristic, typically one belonging to a person.
  4. 4. not consistent or having a fixed pattern.
  5. 5. a demand for something due or believed to be due
  6. 8. the use of symbols.
  7. 9. the basic cause, source, or origin of something.
  8. 11. a place, person, or thing from which something comes or can be obtained.
  9. 12. a simplified drawing showing the appearance, structure, or workings of something.
  10. 13. of vital importance; crucial.