| No. | Item | Definition |
|---|---|---|
| 1. | aberration | a departure from normal |
| 2. | anomaly | something irregular or mistaken |
| 3. | backfire | a plan failing badly |
| 4. | bad call | a poor decision |
| 5. | bad judgment | poor decision-making |
| 6. | black mark | a record of wrongdoing |
| 7. | blooper | a silly mistake |
| 8. | blunder | a careless or stupid mistake |
| 9. | boner | a foolish mistake |
| 10. | booboo | a small silly mistake |
| 11. | botch | a badly done mistake |
| 12. | bug | a fault in software |
| 13. | bungle | a clumsy mistake |
| 14. | carelessness | lack of proper attention |
| 15. | catastrophe | a disastrous mistake or failure |
| 16. | clanger | a conspicuous embarrassing mistake |
| 17. | cock-up | a complete mistake |
| 18. | confusion | a state causing mistakes |
| 19. | debacle | a sudden disastrous failure |
| 20. | defect | a fault or imperfection |
| 21. | deficiency | a lack or inadequacy |
| 22. | demerit | a mark against someone |
| 23. | dereliction | neglect of duty |
| 24. | deviation | departure from what is right |
| 25. | disaster | a very bad failure |
| 26. | error | something done incorrectly |
| 27. | failing | a weakness or fault |
| 28. | fallacy | a mistaken belief or argument |
| 29. | false move | a mistaken action |
| 30. | fault | responsibility for a mistake |
| 31. | faux pas | a socially awkward mistake |
| 32. | fiasco | a complete embarrassing failure |
| 33. | flaw | a mistake or weakness |
| 34. | folly | a foolish mistake |
| 35. | foolishness | poor judgment or sense |
| 36. | fumble | a clumsy mistake or failure |
| 37. | gaffe | an embarrassing social mistake |
| 38. | glitch | a small unexpected problem |
| 39. | goof | a foolish mistake |
| 40. | howler | a glaring stupid mistake |
| 41. | imperfection | a minor fault or defect |
| 42. | imprudence | lack of wise judgment |
| 43. | inaccuracy | lack of correctness |
| 44. | incorrectness | the state of being wrong |
| 45. | indiscretion | an unwise act or remark |
| 46. | infelicity | an awkward mistake in wording |
| 47. | lapse | a temporary failure or mistake |
| 48. | letdown | a disappointing failure |
| 49. | malpractice | professional wrongdoing or error |
| 50. | mess-up | a mistake causing disorder |
| 51. | miscalculation | a wrong calculation or judgment |
| 52. | mischoice | a wrong choice |
| 53. | miscount | count incorrectly |
| 54. | miscue | a small mistake or wrong signal |
| 55. | misfile | file incorrectly |
| 56. | misfire | a failed or mistaken attempt |
| 57. | mishap | an unfortunate mistake or accident |
| 58. | mishear | hear incorrectly |
| 59. | misjudgment | a poor decision or judgment |
| 60. | mislabel | label incorrectly |
| 61. | mislay | lose by putting wrongly |
| 62. | mismanagement | poor handling or administration |
| 63. | misname | call by wrong name |
| 64. | misplace | put in wrong place |
| 65. | misprint | a printing mistake |
| 66. | misquote | quote incorrectly |
| 67. | misreading | a wrong interpretation |
| 68. | misrepresentation | false or misleading statement |
| 69. | misspelling | a spelling mistake |
| 70. | misstate | state incorrectly |
| 71. | misstep | a wrong or awkward action |
| 72. | mix-up | a confusion causing mistakes |
| 73. | muddle | a confused mistake or mess |
| 74. | neglect | failure to give proper care |
| 75. | offense | a wrong or illegal act |
| 76. | omission | something mistakenly left out |
| 77. | overreach | trying too much unwisely |
| 78. | oversight | a mistake from inattention |
| 79. | poor choice | an unwise decision |
| 80. | ruin | destruction from bad actions |
| 81. | shortcoming | a weakness or failing |
| 82. | sin | a moral wrongdoing |
| 83. | slip | a small accidental mistake |
| 84. | sloppiness | careless untidiness or mistakes |
| 85. | snafu | a confused mistake-filled situation |
| 86. | solecism | a grammatical or social mistake |
| 87. | stain | a mark of fault |
| 88. | stumble | a mistake in action or speech |
| 89. | stupidity | lack of good sense |
| 90. | taint | a trace of fault |
| 91. | train wreck | a disastrous mess |
| 92. | transgression | a wrongful act or violation |
| 93. | trespass | a wrongful intrusion or offense |
| 94. | trip-up | a mistake causing difficulty |
| 95. | typo | a typing mistake |
| 96. | undoing | cause of failure or ruin |
| 97. | violation | an act breaking rules |
| 98. | washout | a total failure |
| 99. | wreck | something ruined by mistakes |
| 100. | wrong turn | a mistaken choice or direction |