1. refer
  2. refer oneself
  3. referee
  4. referee oneself
  5. reference
  6. reference oneself
  7. refill
  8. refill oneself
  9. refind
  10. refind oneself
  11. refine
  12. refine oneself
  13. refit
  14. refit oneself
  15. reflect
  16. reflect oneself
  17. refocus
  18. refocus oneself
  19. reform
  20. reform oneself
  21. refrain
  22. refreeze
  23. refreeze oneself
  24. refresh
  25. refresh oneself
  26. refuel
  27. refuel oneself
  28. refurbish
  29. refurbish oneself
  30. refuse
  31. refuse oneself
  32. refute
  33. refute oneself