1. more previous - the most previous

2. more specific - the most specific

3. trustworthier - the trustworthest

4. more informal - the most informal

5. briefer - the briefest

6. busier - the busiest

7. more impossible - the most impossible

8. tougher - the toughest

9. more artifical - the most artifical

10. rarier - the reriest

11. more basic - the most basic

12. more desirable - the most desirable

13. more essential - the most essential

14. more extensive - the most extensive

15. moderner - the modernest

16. more natural - the most natural