| No. | Term | Definition |
|---|---|---|
| 1. | able | skilled and competent |
| 2. | adept | very skilled and quick |
| 3. | adroit | skillful and quick in action |
| 4. | agile | quick and adaptable |
| 5. | alert | quick to notice and respond |
| 6. | astute | shrewd and perceptive |
| 7. | bookish | fond of studying and reading |
| 8. | brainy | very intelligent; academic-minded |
| 9. | bright | quick-witted and intelligent |
| 10. | brilliant | exceptionally intelligent or talented |
| 11. | business-savvy | skilled in business judgment |
| 12. | businesslike | efficient and practical |
| 13. | canny | shrewd and careful |
| 14. | capable | able to do things well |
| 15. | clear-headed | thinking clearly and calmly |
| 16. | clever | quick to understand or devise |
| 17. | competent | having adequate skill and ability |
| 18. | considered | thought out carefully |
| 19. | diplomatic | skilled in dealing with others |
| 20. | discerning | showing good judgment |
| 21. | down-to-earth | practical and realistic |
| 22. | educated | having received good schooling |
| 23. | effective | producing the intended result |
| 24. | efficient | working well without waste |
| 25. | erudite | having deep learned knowledge |
| 26. | experienced | having gained knowledge over time |
| 27. | expert | highly skilled and knowledgeable |
| 28. | fast learner | person who learns quickly |
| 29. | fast-thinking | quick to reason and respond |
| 30. | genius | showing extraordinary intellect |
| 31. | gifted | naturally talented or intelligent |
| 32. | good with numbers | skilled at arithmetic and figures |
| 33. | grown-up | sensible and responsible |
| 34. | handy | skillful with practical tasks |
| 35. | high-IQ | having very high intelligence |
| 36. | hip | aware of trends and culture |
| 37. | ingenious | clever and inventive |
| 38. | insightful | showing deep understanding |
| 39. | intellectual | relating to serious thinking |
| 40. | intellectually gifted | naturally very intelligent |
| 41. | intelligent | having strong mental ability |
| 42. | intuitive | understanding without reasoning |
| 43. | inventive | good at creating new ideas |
| 44. | judicious | showing sound judgment |
| 45. | keen | sharp and eager-minded |
| 46. | knowledgeable | well informed; well educated |
| 47. | learned | highly educated; scholarly |
| 48. | level-headed | calm and sensible |
| 49. | literate | able to read and write |
| 50. | logical | showing clear reasoning |
| 51. | masterful | showing great skill |
| 52. | mature | showing adult judgment |
| 53. | mentally agile | quick and flexible in thought |
| 54. | mentally sharp | quick to understand and react |
| 55. | nimble | quick and light in movement |
| 56. | no fool | not easily deceived |
| 57. | nobody’s fool | hard to trick |
| 58. | numerate | able with numbers |
| 59. | observant | good at noticing details |
| 60. | on the ball | alert and quick to act |
| 61. | on top of it | in control and informed |
| 62. | perceptive | quick to notice and understand |
| 63. | perspicacious | keenly perceptive and wise |
| 64. | polished | refined and skillful |
| 65. | practical | suited to real needs |
| 66. | proficient | skilled through practice |
| 67. | prudent | careful and wise |
| 68. | quick as a whip | very quick-witted |
| 69. | quick on the uptake | fast to understand |
| 70. | quick on your feet | able to respond fast |
| 71. | quick to learn | able to learn fast |
| 72. | quick-minded | able to think quickly |
| 73. | quick-witted | able to think fast |
| 74. | rational | based on reason and logic |
| 75. | razor-sharp | very sharp and perceptive |
| 76. | realistic | seeing things as they are |
| 77. | reflective | given to careful thought |
| 78. | resourceful | good at solving problems |
| 79. | savvy | knowledgeable and practical |
| 80. | scholarly | showing academic knowledge |
| 81. | sensible | showing practical good sense |
| 82. | sharp | mentally quick and perceptive |
| 83. | shrewd | showing sharp practical judgment |
| 84. | skilled | having learned ability |
| 85. | switched on | alert and intelligent |
| 86. | tactful | skilled at handling people |
| 87. | tactical | skillful in handling situations |
| 88. | talented | having natural ability |
| 89. | tech-savvy | skilled with technology |
| 90. | thoughtful | showing careful consideration |
| 91. | together | organized and sensible |
| 92. | up to speed | fully informed and current |
| 93. | well-informed | having up-to-date knowledge |
| 94. | well-read | having read many books |
| 95. | well-spoken | speaking clearly and correctly |
| 96. | wide-awake | fully alert and aware |
| 97. | wily | clever and deceptive |
| 98. | wise | showing good judgment and insight |
| 99. | with it | aware and quick-minded |
| 100. | worldly | experienced and practical |