1. straddle
  2. straighten
  3. straighten oneself
  4. strain
  5. strain oneself
  6. strangle
  7. strangle oneself
  8. straw
  9. straw oneself
  10. stray
  11. stray oneself
  12. stream
  13. stream oneself
  14. streamline
  15. streamline oneself
  16. strengthen
  17. strengthen oneself
  18. stress
  19. stress oneself
  20. stretch
  21. stretch oneself
  22. strew
  23. strew oneself
  24. stride
  25. strike
  26. strike oneself
  27. string
  28. string oneself
  29. strip
  30. strip oneself
  31. strive
  32. strive oneself
  33. stroll
  34. stroll oneself
  35. struggle
  36. struggle oneself
  37. strum
  38. strum oneself