1. wood
2. brook
3. tool
4. put
5. wool
6. push
7. full
8. roof
9. group
10. prove
11. stood
12. stool
13. hook
14. smooth
15. shoot
16. bush
17. fool
18. pull
19. soup
20. move

Challenge words:

21. soot
22. marooned
23. pudding
24. cocoon
25. superb