1.6

1. copious
2. eminent
3. frugal
4. languid
5. hostile
6. laudable
7. lenient
8. luminous
9. nocturnal
10. oblique
11. obnoxious
12. obtrusive
13. perpetual
14. regal
15. vagrant
16. vehement
17. vindictive
18. vociferous
19. vulnerable
20. zealous