Solve the synonym puzzle

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Across
  1. 4. approximate
  2. 8. measure
  3. 11. step by step
  4. 12. municipal
  5. 16. glad
  6. 18. triumph
  7. 19. personal
  8. 21. forecast
  9. 22. inclination
  10. 23. society
  11. 25. alter
  12. 26. nourish
  13. 32. development
  14. 33. confidence
  15. 34. disappointment
  16. 37. outside
  17. 38. refugee
  18. 40. clever
  19. 44. : escalate
  20. 47. forbid
  21. 48. acquire
  22. 49. occurrence
  23. 51. : bendable
  24. 54. take place
  25. 55. useful
  26. 56. customer
  27. 57. display
Down
  1. 1. at present
  2. 2. declare
  3. 3. prevalent
  4. 5. sufferer
  5. 6. notably
  6. 7. confront
  7. 9. change
  8. 10. : source
  9. 13. sometimes
  10. 14. : scrutinize
  11. 15. employee
  12. 17. immediate
  13. 20. diminish
  14. 24. matter
  15. 27. crucial
  16. 28. effect
  17. 29. commerce
  18. 30. estimate
  19. 31. : fate
  20. 35. grant
  21. 36. : litter
  22. 39. discharge
  23. 41. calamity
  24. 42. refrain from
  25. 43. exact
  26. 45. obtainable
  27. 46. exhaustion
  28. 50. : evidently
  29. 52. massive
  30. 53. severe