Unit 13 — Common Noun Forms
1. permanent
2. primary
3. delicate
4. relative
5. suitable
6. visible
7. valuable
8. favorable or favourable
9. fashionable
10. reasonable
11. changeable
12. noticeable
13. preferable
14. portable
15. comfortable
16. confident
17. obedient
18. intelligent
19. temporary
20. voluntary
2. primary
3. delicate
4. relative
5. suitable
6. visible
7. valuable
8. favorable or favourable
9. fashionable
10. reasonable
11. changeable
12. noticeable
13. preferable
14. portable
15. comfortable
16. confident
17. obedient
18. intelligent
19. temporary
20. voluntary