| No. | Item | Definition |
|---|---|---|
| 1. | ability | capacity to do or understand something |
| 2. | acuity | sharpness of thought or perception |
| 3. | acumen | sharpness in judgment or insight |
| 4. | alertness | mental readiness and attentiveness |
| 5. | apprehension | understanding or grasp of meaning |
| 6. | aptitude | natural ability to learn or understand |
| 7. | astuteness | shrewdness and sharp practical judgment |
| 8. | awareness | knowledge or perception of a situation |
| 9. | braininess | informal intellectual ability |
| 10. | brainpower | mental ability or intellectual strength |
| 11. | brains | informal mental ability or cleverness |
| 12. | brightness | quickness in learning or understanding |
| 13. | brilliance | exceptional mental ability or talent |
| 14. | capability | power or ability to perform mentally |
| 15. | capacity | potential for learning or understanding |
| 16. | clarity | clearness of thought or understanding |
| 17. | cleverness | quick and effective thinking ability |
| 18. | cognition | mental process of knowing and understanding |
| 19. | cognitive ability | capacity for thought and learning |
| 20. | common sense | practical everyday judgment |
| 21. | comprehension | ability to understand something |
| 22. | consciousness | awareness and mental perception |
| 23. | deduction | reasoning from general principles |
| 24. | deliberation | careful thought before decision |
| 25. | diplomacy | skillful, tactful judgment in dealings |
| 26. | discernment | ability to judge clearly and wisely |
| 27. | discrimination | ability to distinguish differences clearly |
| 28. | education | knowledge gained through instruction |
| 29. | erudition | extensive learning and knowledge |
| 30. | expertise | specialized knowledge and skill |
| 31. | farsightedness | wise planning for the future |
| 32. | finesse | skillful judgment and subtle handling |
| 33. | foresight | ability to anticipate future needs |
| 34. | genius | extraordinary intellectual ability |
| 35. | giftedness | exceptional natural ability |
| 36. | good sense | sound practical judgment |
| 37. | grasp | understanding of a subject or idea |
| 38. | guile | sly intelligence or cunning |
| 39. | horse sense | informal practical common sense |
| 40. | imagination | creative mental ability |
| 41. | ingenuity | cleverness in solving problems |
| 42. | insight | clear understanding of a situation |
| 43. | intellect | mental power and reasoning ability |
| 44. | intellectual ability | capacity for thought and understanding |
| 45. | intellectual capacity | mental power for learning and reasoning |
| 46. | intellectual power | strength of mind or reasoning |
| 47. | intellectuality | quality of being intellectually capable |
| 48. | judgment | ability to make sound decisions |
| 49. | judiciousness | quality of showing sound judgment |
| 50. | keenness | sharpness of mind or perception |
| 51. | knack | natural skill or aptitude |
| 52. | know-how | practical knowledge and skill |
| 53. | knowledge | information and understanding gained through learning |
| 54. | learning | knowledge gained through study |
| 55. | literacy | knowledge or competence in an area |
| 56. | logic | sound reasoning or rational thought |
| 57. | lucidity | clarity of thought or expression |
| 58. | maturity | soundness of judgment from experience |
| 59. | mental ability | capacity to think and learn |
| 60. | mental acuity | sharpness of thinking |
| 61. | mental agility | quickness and flexibility of thought |
| 62. | mental capacity | ability to understand and reason |
| 63. | mental sharpness | quick and clear thinking ability |
| 64. | mentality | way of thinking or mental capacity |
| 65. | mind | one’s thinking and understanding ability |
| 66. | nous | practical intelligence or common sense |
| 67. | penetration | deep insight or understanding |
| 68. | perception | ability to notice and understand |
| 69. | percipience | keen mental perception |
| 70. | perspicacity | keen insight and understanding |
| 71. | problem-solving | ability to find solutions |
| 72. | prudence | careful, wise judgment |
| 73. | quick-wittedness | ability to think quickly |
| 74. | quickness | speed of understanding or response |
| 75. | ratiocination | formal logical reasoning |
| 76. | rationality | quality of using reason |
| 77. | realization | clear understanding of something |
| 78. | reason | capacity for logical thought |
| 79. | reasoning | process or power of logical thought |
| 80. | recognition | identification or understanding of something |
| 81. | reflection | careful thought or consideration |
| 82. | resourcefulness | cleverness in handling difficulties |
| 83. | sagacity | wise and penetrating judgment |
| 84. | savvy | practical knowledge and good judgment |
| 85. | scholarship | deep academic knowledge |
| 86. | sense | practical judgment or understanding |
| 87. | sharpness | mental keenness or alertness |
| 88. | shrewdness | clever practical judgment |
| 89. | smartness | quality of being intelligent or clever |
| 90. | smarts | informal practical intelligence or cleverness |
| 91. | street smarts | practical urban awareness and judgment |
| 92. | tact | skillful judgment in social situations |
| 93. | talent | natural skill or ability |
| 94. | thinking | mental process of reasoning or reflection |
| 95. | thought | capacity or process of thinking |
| 96. | understanding | ability to grasp meaning or significance |
| 97. | vision | imaginative insight and judgment |
| 98. | wiles | clever strategies or tricks |
| 99. | wisdom | sound judgment from knowledge and experience |
| 100. | wit | quick intelligence and verbal cleverness |
