Words ending in –ct change to -cto. Exact cognates ending in -al.

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Across
  1. 6. act
  2. 7. tropical
  3. 12. ideal
  4. 14. contact
  5. 16. product
  6. 17. perfect
  7. 18. vital
  8. 19. casual
Down
  1. 1. digital
  2. 2. correct
  3. 3. plural
  4. 4. conflict
  5. 5. actual
  6. 8. insect
  7. 9. accidental
  8. 10. hospital
  9. 11. effect
  10. 13. animal
  11. 15. special