BASIC
1. produce 2. production 3. consume 4. consumption 5. reduce 6. reduction 7. retain 8. retention 9. detain 10. detention 11. introduce 12. introduction 13. resume 14. resumption 15. induce 16. induction 17. abstain 18. abstention 19. presume 20. presumption
REVIEW
21. revise 22. revision 23. grateful 24. gratitude
CHALLENGE
25. atrocious 26. atrocity 27. ferocious 28. ferocity
