1. to steal -stealer 2. to watch - watcher 3.to sing - singer 4.to act - actor 5.to walk - walker 6.to clean - cleaner 7. to call - caller 8. to start - starter 9.to speak - speaker 10. to teach - teacher 11. to dance - dancer 12. to freeze - freezer 13.to knock - knocker 14. to to wash - washer 15. to bake - baker
