1. congratulate
2. continent
3. connection
4. common
5. communicate
6. command
7. compatible
8. complicated
9. compliment
10. combination
11. instinct
12. inspection
13. innumerable
14. immeasurable
15. immobile
16. immature
17. impersonate
18. impossibility
19. impression
20. imbalance
2. continent
3. connection
4. common
5. communicate
6. command
7. compatible
8. complicated
9. compliment
10. combination
11. instinct
12. inspection
13. innumerable
14. immeasurable
15. immobile
16. immature
17. impersonate
18. impossibility
19. impression
20. imbalance