| No. | Item | Definition |
|---|---|---|
| 1. | accident | an unplanned unfortunate event |
| 2. | backfire | produce opposite bad result |
| 3. | blooper | a humorous mistake |
| 4. | blunder | a serious careless mistake |
| 5. | boner | a foolish mistake |
| 6. | booboo | a small silly mistake |
| 7. | botch | a badly done mistake |
| 8. | breach | breaking a rule or agreement |
| 9. | breakdown | a failure in operation |
| 10. | bug | a fault in a system |
| 11. | bungle | a clumsy mistake or failure |
| 12. | carelessness | lack of proper attention |
| 13. | clanger | a glaring embarrassing mistake |
| 14. | clumsiness | awkward lack of skill |
| 15. | cock-up | a badly made mistake |
| 16. | confusion | lack of clear understanding |
| 17. | debacle | a sudden complete failure |
| 18. | defect | a fault or imperfection |
| 19. | derailment | a failure that disrupts progress |
| 20. | disaster | a very bad failure |
| 21. | distortion | a twisted inaccurate version |
| 22. | error | a mistake or inaccuracy |
| 23. | failing | a weakness or fault |
| 24. | failure | lack of success or breakdown |
| 25. | fallacy | a mistaken belief or argument |
| 26. | false start | an unsuccessful beginning |
| 27. | fault | responsibility for a mistake |
| 28. | faux pas | a socially awkward mistake |
| 29. | fiasco | a complete embarrassing failure |
| 30. | flaw | a weakness or defect |
| 31. | flub | a bungled mistake |
| 32. | fluff | a small performance mistake |
| 33. | fumble | a clumsy mistake |
| 34. | gaffe | an embarrassing social mistake |
| 35. | glitch | a small unexpected problem |
| 36. | goof | a silly mistake |
| 37. | hitch | a minor problem or difficulty |
| 38. | howler | a very obvious mistake |
| 39. | impropriety | behavior that is inappropriate |
| 40. | inaccuracy | lack of exact correctness |
| 41. | incompetence | lack of ability or skill |
| 42. | incorrectness | state of being wrong |
| 43. | indiscretion | poorly judged behavior |
| 44. | ineptitude | lack of skill or competence |
| 45. | infelicity | an awkward mistake in wording |
| 46. | lapse | a temporary failure or mistake |
| 47. | malapropism | wrong word used by mistake |
| 48. | malfunction | a failure to work properly |
| 49. | misapplication | wrong use of something |
| 50. | miscalculation | a wrong calculation or judgment |
| 51. | miscommunication | failure to communicate correctly |
| 52. | misconception | a wrong idea or belief |
| 53. | miscount | an incorrect count |
| 54. | miscue | a wrong action or signal |
| 55. | misfire | a failed or mistaken attempt |
| 56. | misidentification | wrongly identifying something |
| 57. | misjudgment | a wrong opinion or decision |
| 58. | mislabeling | using the wrong label |
| 59. | misplacement | putting something in wrong place |
| 60. | misprint | a printing mistake |
| 61. | mispronunciation | incorrect pronunciation of a word |
| 62. | misquotation | an incorrect quotation |
| 63. | misreading | wrong interpretation of something |
| 64. | misspelling | an incorrect spelling |
| 65. | misstatement | a false or incorrect statement |
| 66. | misstep | a wrong action or decision |
| 67. | mistake | something done wrongly |
| 68. | mistranslation | an incorrect translation |
| 69. | misunderstanding | wrong understanding of something |
| 70. | mix-up | a confusion causing mistakes |
| 71. | muff | a failure through clumsiness |
| 72. | negligence | failure to take proper care |
| 73. | offense | a breach of law or rule |
| 74. | omission | something mistakenly left out |
| 75. | overcorrection | fixing something too much |
| 76. | overcount | a count that is too high |
| 77. | overestimation | judging too high |
| 78. | overreaction | an excessive response |
| 79. | oversight | a failure to notice |
| 80. | problem | something wrong needing attention |
| 81. | screw-up | a serious mistake or failure |
| 82. | setback | a reversal or delay |
| 83. | shortcoming | a weakness or failing |
| 84. | sin | a moral wrongdoing |
| 85. | slip | a small accidental mistake |
| 86. | sloppiness | careless untidy inaccuracy |
| 87. | snag | a small unexpected problem |
| 88. | solecism | a grammatical or social mistake |
| 89. | stumble | an unsteady mistake or slip |
| 90. | transgression | an act breaking a rule |
| 91. | trespass | wrongful intrusion or violation |
| 92. | trip-up | a mistake causing difficulty |
| 93. | typo | a typing mistake |
| 94. | undercount | a count that is too low |
| 95. | underestimation | judging too low |
| 96. | undoing | cause of failure or ruin |
| 97. | violation | breaking a rule or law |
| 98. | washout | a complete failure |
| 99. | wrong | something incorrect or mistaken |
| 100. | wrongdoing | bad or improper action |