Verified Answer :

  1. inactive
    2. incomplete
    3. incorrect
    4. independent 
    5. indirect
    6. invisible 
    7. nonfat
    8. nonfiction
    9. nonprofit
    10. nonsense
    11. nonstop 
    12. redo
    13. refill
    14. relocate
    15. repay 
    16. replaced 
    17. reread
    18. retell
    19. rethink
    20. return 
    Hope i helped, and i wish you good luck in the years to come!