One Word Substitution

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Across
  1. 1. To give up one's authority or throne
  2. 4. Act of giving up (renouncing) the throne
  3. 7. An entertainer who performs difficult physical feats
  4. 8. To refuse or deny oneself
  5. 11. A place where animals are slaughtered for consumption as food
  6. 13. To reduce to a shorter form intended to stand for the whole
  7. 15. Cancel or do away with (a law or agreement)
  8. 17. An abbreviation formed from the initial letters of other words and pronounced as a word
  9. 18. Existing in a land from the earliest times or from before the arrival of colonists
  10. 20. A person whose profession is to keep accounts
  11. 21. The scientific study of sound
  12. 22. Wildly unreasonable, illogical or ridiculous
  13. 23. Deviation from the right course
  14. 24. A shortened version of a larger work
Down
  1. 2. Fear of great heights
  2. 3. The superior of a monastery
  3. 5. To increase the speed
  4. 6. Become less intense or widespread
  5. 9. The act of washing oneself
  6. 10. A person who helps another to commit a crime or to do something morally wrong // A partner in crime
  7. 11. To decide and state officially in court that somebody is not guilty of a crime
  8. 12. Be harmonious or consistent with
  9. 13. To shorten a piece of writing without losing the sense
  10. 14. To go away suddenly and secretly in order to escape from somewhere
  11. 15. Formally put an end to a system, practice, or institution
  12. 16. To do something // To behave in a particular way // To perform a part in a play/film/function
  13. 18. Formal forgiveness of a person’s sins
  14. 19. The original inhabitants/natives of a country
  15. 20. Sharp, bitter, or harsh in temper, language, etc.
  16. 21. Any award, honour or laudatory notice