| No. | Item | Definition |
|---|---|---|
| 1. | ambiguity | uncertainty from multiple meanings |
| 2. | ambivalence | mixed feelings causing uncertainty |
| 3. | anxiety | nervous uncertainty about something |
| 4. | apprehension | anxious anticipation and doubt |
| 5. | bewilderment | confused uncertainty and doubt |
| 6. | call into question | make something seem doubtful |
| 7. | caution | care due to uncertainty |
| 8. | concern | worrying doubt about something |
| 9. | confusion | lack of clear understanding |
| 10. | cynicism | doubting others’ motives |
| 11. | diffidence | lack of confidence; self-doubt |
| 12. | disbelief | refusal to accept as true |
| 13. | distrust | lack of trust or confidence |
| 14. | distrustfulness | tendency to distrust |
| 15. | doubtful | uncertain; not sure |
| 16. | doubtfulness | quality of being uncertain |
| 17. | dubiety | state of being doubtful |
| 18. | dubious | not to be relied on; doubtful |
| 19. | dubiousness | quality of being dubious |
| 20. | entertain doubts | consider doubts as possible |
| 21. | equivocality | quality of being uncertain |
| 22. | equivocalness | unclear; open to doubt |
| 23. | equivocation | uncertainty shown in speech |
| 24. | harbor doubts | keep doubts in mind |
| 25. | have doubts | feel uncertain about something |
| 26. | hesitancy | tendency to hesitate from doubt |
| 27. | hesitant belief | belief held with hesitation |
| 28. | hesitation | pause from uncertainty or reluctance |
| 29. | iffy | uncertain; doubtful |
| 30. | in two minds | unable to decide; uncertain |
| 31. | inconclusiveness | not leading to certainty |
| 32. | incredulity | unwillingness to believe |
| 33. | indecision | inability to decide from doubt |
| 34. | indeterminacy | not clearly determined; uncertain |
| 35. | insecurity | lack of confidence or certainty |
| 36. | instability | lack of steadiness; uncertainty |
| 37. | lack of assurance | absence of confidence |
| 38. | lack of belief | absence of belief |
| 39. | lack of certainty | absence of certainty |
| 40. | lack of confidence | insufficient trust or assurance |
| 41. | lack of conviction | insufficient certainty or belief |
| 42. | lack of faith | absence of belief or trust |
| 43. | lack of surety | absence of surety |
| 44. | lack of trust | absence of trust |
| 45. | leery | suspicious; doubtful |
| 46. | misbelief | incorrect belief; doubtful acceptance |
| 47. | misgiving | uneasy feeling of doubt |
| 48. | misgivings | doubts or uneasy feelings |
| 49. | mistrust | lack of trust |
| 50. | mistrustfulness | tendency to mistrust |
| 51. | not certain | uncertain; doubtful |
| 52. | not confident | lacking confidence; doubtful |
| 53. | not convinced | still doubtful |
| 54. | not sure | uncertain; lacking confidence |
| 55. | on the fence | undecided; uncertain |
| 56. | open question | unsettled matter; uncertain |
| 57. | perplexity | confused uncertainty |
| 58. | problematic | open to doubt; uncertain |
| 59. | problematical | doubtful; uncertain |
| 60. | puzzlement | state of being puzzled |
| 61. | qualm | uneasy doubt or worry |
| 62. | qualms | uneasy doubts or worries |
| 63. | question | a doubt about something |
| 64. | questionable | open to doubt |
| 65. | questioning | expressing doubt or uncertainty |
| 66. | raise doubts | cause uncertainty about something |
| 67. | reluctance | unwillingness from uncertainty |
| 68. | reluctant belief | belief accepted with doubt |
| 69. | reservation | qualification due to uncertainty |
| 70. | reservations | doubts that limit agreement |
| 71. | scruple | moral hesitation or doubt |
| 72. | scruples | moral doubts about action |
| 73. | second thoughts | renewed doubts after deciding |
| 74. | second-guessing | doubting a decision afterward |
| 75. | shaky belief | belief lacking certainty |
| 76. | skeptical attitude | habit of doubting claims |
| 77. | skepticalness | tendency to be skeptical |
| 78. | skepticism | attitude of doubting claims |
| 79. | suspicion | belief something may be wrong |
| 80. | suspiciousness | tendency to suspect wrongdoing |
| 81. | tentative feeling | uncertain, not firm |
| 82. | tentativeness | lack of certainty; provisionality |
| 83. | tenuous | weak and uncertain |
| 84. | tenuousness | weakness that invites doubt |
| 85. | unbelief | lack of belief |
| 86. | uncertain belief | belief held with doubt |
| 87. | uncertain feeling | feeling of not being sure |
| 88. | uncertainness | state of being uncertain |
| 89. | uncertainty | lack of certainty or sureness |
| 90. | uncertitude | uncertain state or condition |
| 91. | unclear | not certain or definite |
| 92. | unease | discomfort from uncertainty |
| 93. | unsettledness | state of not being settled |
| 94. | unsureness | lack of sureness |
| 95. | vacillation | wavering between choices |
| 96. | vagueness | lack of clear meaning |
| 97. | wariness | cautious doubt about risk |
| 98. | wary | cautiously doubtful |
| 99. | wavering | shifting due to uncertainty |
| 100. | worry | anxious doubt about outcomes |
