unit 15 1. nickel 2. metal 3. total 4. eagle 5. middle 6. special 7. final 8. model 9. bottle 10. double 11. towel 12. medal 13. battle 14. candle 15. trouble 16. handle 17. simple 18. uncle 19. title 20. cattle 21.` decimal 22. financial 23. trifle 24. cancel 25. industrial