| No. | Item | Definition |
|---|---|---|
| 1. | alleged | claimed but unproven |
| 2. | ambiguous | having more than one meaning |
| 3. | arguable | open to debate |
| 4. | at issue | under dispute or discussion |
| 5. | baseless | without foundation in fact |
| 6. | challenged | disputed or questioned |
| 7. | chancy | uncertain and risky |
| 8. | cloudy | unclear or doubtful |
| 9. | conjectural | based on guesswork |
| 10. | contested | disputed or challenged |
| 11. | controvertible | able to be disputed |
| 12. | debatable | open to argument or doubt |
| 13. | dicey | risky or uncertain |
| 14. | disputable | able to be questioned |
| 15. | dubious | questionable or uncertain |
| 16. | equivocal | not clear or definite |
| 17. | erroneous | wrong or possibly wrong |
| 18. | faint | small and uncertain |
| 19. | false | not true |
| 20. | far-fetched | unlikely to be true |
| 21. | fishy | suspicious or doubtful |
| 22. | flimsy | weak and unconvincing |
| 23. | foggy | unclear in thought or detail |
| 24. | groundless | having no valid basis |
| 25. | hard to accept | difficult to believe |
| 26. | hard to believe | difficult to accept as true |
| 27. | hard to credit | difficult to believe |
| 28. | hazy | unclear or uncertain |
| 29. | hypothetical | assumed but unproven |
| 30. | iffy | uncertain or unreliable |
| 31. | implausible | not seeming believable |
| 32. | improbable | not likely to be true |
| 33. | in doubt | not certain |
| 34. | in question | being doubted or examined |
| 35. | incorrect | not right or accurate |
| 36. | incredible | too unlikely to believe |
| 37. | indefinite | not exact or fixed |
| 38. | indeterminate | not clearly determined |
| 39. | invalid | not sound or valid |
| 40. | liable to question | subject to doubt |
| 41. | mistrusted | not trusted |
| 42. | moot | open to debate |
| 43. | murky | unclear or confusing |
| 44. | nebulous | vague and unclear |
| 45. | not certain | lacking certainty |
| 46. | not clear | uncertain or ambiguous |
| 47. | not confirmed | lacking confirmation |
| 48. | not definite | not clearly fixed |
| 49. | not final | still subject to change |
| 50. | not proven | lacking proof |
| 51. | not settled | not finally decided |
| 52. | not sure | uncertain |
| 53. | obscure | not clearly understood |
| 54. | open | not finally decided |
| 55. | ostensible | appearing true but doubtful |
| 56. | ostensibly true | apparently true but uncertain |
| 57. | pending | awaiting decision or confirmation |
| 58. | poorly founded | based on weak evidence |
| 59. | precarious | uncertain and risky |
| 60. | presumed | believed but not certain |
| 61. | problematic | causing doubt or difficulty |
| 62. | professed | claimed, not necessarily genuine |
| 63. | provisional | temporary and not final |
| 64. | purported | claimed but not proven |
| 65. | putative | generally supposed, not certain |
| 66. | questionable | open to doubt |
| 67. | questioned | subject to doubt |
| 68. | remote | unlikely to happen |
| 69. | reported | stated but not confirmed |
| 70. | rumored | said but unconfirmed |
| 71. | shaky | not firm or reliable |
| 72. | slight | small in likelihood |
| 73. | slim | small or doubtful in chance |
| 74. | so-called | named but doubted |
| 75. | speculative | based on guesswork |
| 76. | strained | not natural or convincing |
| 77. | supposed | claimed but uncertain |
| 78. | suspect | not fully trustworthy |
| 79. | suspicious | causing distrust or doubt |
| 80. | tentative | not final or certain |
| 81. | tenuous | weak or uncertain |
| 82. | theoretical | possible but not proven |
| 83. | thin | lacking strong support |
| 84. | touch-and-go | very uncertain in outcome |
| 85. | uncertain | not known or decided |
| 86. | unclear | not clear or certain |
| 87. | unconfirmed | not officially verified |
| 88. | undecided | not yet decided |
| 89. | unfounded | not based on facts |
| 90. | unlikely | not expected to happen |
| 91. | unproven | not shown to be true |
| 92. | unresolved | not settled or answered |
| 93. | unsettled | not decided or resolved |
| 94. | unsubstantiated | not supported by evidence |
| 95. | unsupported | lacking evidence or backing |
| 96. | unsure | not feeling certain |
| 97. | unverified | not proven true |
| 98. | vague | not clearly expressed |
| 99. | weak | not convincing or strong |
| 100. | weakly supported | lacking strong evidence |