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!