Hard Words Puzzle

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Across
  1. 3. not being able to be changed or reformed (specifically behaviour)
  2. 5. a theatre/concert hall
  3. 6. the sound of a bell, especially when rung solemnly
  4. 7. splendid and expensive looking
  5. 8. grind (one's teeth) together as a sign of anger
  6. 9. a piece of jewellery in the shape of a medal worn as a pendant
  7. 10. the occurrence and development of events by chance in a happy/beneficial way
  8. 13. courage in pain or adversity
  9. 15. filled with horror/shock
  10. 18. a difference in level or treatment, especially one that is seen as unfair
  11. 19. the finale of a play, film or narrative
  12. 20. large scale and violent
Down
  1. 1. representing the most perfect or typical example of a quality or class
  2. 2. a person or thing living or existing at the same time as another
  3. 4. lacking sense or meaning
  4. 11. a system of ideas and ideals, especially one that forms the basis of economic or political theory
  5. 12. to great to be expressed in words
  6. 14. having or showing knowledge of events before they take place
  7. 16. mercy
  8. 17. a pale purple color