Word Formation

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Across
  1. 4. The adverbal form of "miracle"
  2. 6. The verb form of "perception"
  3. 11. The noun form of "to instal"
  4. 13. The opposite of "variable"
  5. 15. The noun form of "to imply"
  6. 16. The adjective form of "fraud"
  7. 18. The opposite of regular
  8. 20. The adverbal form of "exponent"
  9. 21. The opposite of fidelity
Down
  1. 1. The opposite of "activated"
  2. 2. The noun form of "regular"
  3. 3. The noun form of "to acknowledge"
  4. 5. The opposite of "infection"
  5. 7. The opposite of "to stabilise"
  6. 8. The verb form of "formal"
  7. 9. The verb form of "facility"
  8. 10. The opposite of "fortune"
  9. 12. The noun form of "diagnose"
  10. 14. The verb form of "broad"
  11. 17. The adjective form of "number"
  12. 19. The adjective form of "allergy"