1. enjoy enjoyable 

2. economy economic 

3. perfect prefect 

4. stall store 

5. homeware homework 

6. food foot 

7. fit feet 

8. bought brought 

9. lack lag 

10. circle cycle 

11. sit-up zip up 

12. meal mail 

13. importance important 

14. person present (as in gift) 

15. health hell 

16. big brick 

17. mend hand 

18. healthy heavy