What are 100 words that are difficult to spell?

A few hard to spell words:

1. ache

2. psychology

3. cynic

4. Sioux

5. subpoena

6. knife

7. pneumatic

8. opaque

9. chorus

10. owe

11. laugh

12. physique

13. once

14. coax

A few more

15. rhythm

16. immediately

17. accommodation

18. diarrhoea / diarrhea (US)

19. supersede

20. precede

21. proceed

22. succeed

23. seize

24. weird

25. occurrence

26. separate

27. pursue

28. harass

29. aisle

30. minuscule

31. embarrass

32. memento

33. privilege

34. millennium

35. definitely

Medical and scientific words :36. duumvir

37. coccyx

38. phlegm

39. axlotl

40. echidna

41. phthalaldehyde

42. ichthyophthiriidae

Legal scrabble words:43. zyzzyva

44. syzygy

45. muzjiks

46. nylghaus

47. nudzhes

48. tyiyn

49. hryvnia

Longest words(nobody actually expects to spell these, but they are among the longest actual words)

50. spectrophotofluorometrically

51. anaesthetic

52. desalination

53. otorhinolaryngological

54. immunoelectrophoretically

55. psychophysicotherapeutics

56. thyroparathyroidectomized

57. pneumoencephalographically

58. radioimmunoelectrophoresis

59. psychoneuroendocrinological

60. hepaticocholangiogastrostomy

61. antidisestablishmentarianism

62. floccinaucinihilipilification

63. pseudopseudohypoparathyroidism

64. metaphysico-theolo go-cosmonigology

65. praetertranssub stantiationalistically

66. osteosarchaematosplan chnochondroneuromuelous

67. pneumonoultramicroscopicsilicovolcanoconiosis

68. osseocarnisanguineovis cericartilaginonervomedullary

69. aequeosalinocalcalinoce raceoaluminosocupreovitriolic

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