1. common

2. strong

3. hot (temperature)

4. best

5. responsible

6. elementary

7. amazed, impressed (i)

8. personal

9. next (p)

10. educational

11. punished

12. natural

13. tiny

14. practical

15. satisfied

16. meaningful

17. exhausting (f)

18. confident

19. iron

20. useless

21. sweet

22. safe

23. secret

24. wrong, incorrect (i)

25. fat (food)

26. wonderful (-x)

27. obligatory

28. strange

29. mobile

30. broad, wide (v)

31. black

32. surprised

33. smelly

34. plastic

35. another, other

36. available

37. silly (b)

38. incredible

39. square

40. boring