| No. | Item | Definition |
|---|---|---|
| 1. | absorption | deep mental involvement |
| 2. | analysis | detailed examination in thought |
| 3. | analyzing | thinking about in detail |
| 4. | anticipating | thinking ahead to expect |
| 5. | anticipation | thinking ahead expectantly |
| 6. | assessing | thinking about carefully to judge |
| 7. | assessment | careful consideration and judgment |
| 8. | attention | careful mental focus |
| 9. | balancing | thinking about competing factors |
| 10. | being analytical | thinking in a detailed way |
| 11. | believing | thinking something is true |
| 12. | brainstorming | thinking up ideas |
| 13. | brainwork | mental effort and thinking |
| 14. | brooding | gloomy persistent thinking |
| 15. | calculation | thinking through numbers or outcomes |
| 16. | chewing over | thinking about carefully |
| 17. | cogitation | intense careful thinking |
| 18. | concentration | focused mental attention |
| 19. | consideration | careful thought before deciding |
| 20. | considering | thinking about seriously |
| 21. | contemplating | thinking deeply about |
| 22. | contemplation | deep quiet thinking |
| 23. | daydreaming | pleasant wandering thought |
| 24. | deliberating | thinking carefully before deciding |
| 25. | deliberation | long and careful thinking |
| 26. | digesting | taking time to think over |
| 27. | dreaming | thinking in a fanciful way |
| 28. | envisioning | imagining as possible |
| 29. | estimating | thinking roughly about amount |
| 30. | evaluating | thinking about value or quality |
| 31. | evaluation | careful judging in thought |
| 32. | examination | careful mental consideration |
| 33. | examining | thinking about closely |
| 34. | exploration | careful mental searching |
| 35. | figuring | working something out mentally |
| 36. | fixation | obsessive focused thinking |
| 37. | focus | directed mental attention |
| 38. | focusing on | directing thought toward |
| 39. | forecasting | thinking ahead from signs |
| 40. | forethought | thinking ahead wisely |
| 41. | frame of mind | current mental state |
| 42. | gauging | judging by thought |
| 43. | giving it thought | thinking about it |
| 44. | guessing | thinking without certainty |
| 45. | heeding | thinking carefully about advice |
| 46. | idea | a thought in the mind |
| 47. | imagination | creative mental activity |
| 48. | imagining | forming ideas mentally |
| 49. | inquiry | thoughtful investigation |
| 50. | intellection | the act of understanding mentally |
| 51. | judging | forming an opinion mentally |
| 52. | making sense of | understanding by thinking |
| 53. | meditating on | thinking deeply about |
| 54. | meditation | focused deep thought |
| 55. | mentality | characteristic way of thinking |
| 56. | mentation | mental activity or thought |
| 57. | minding | giving thought or attention |
| 58. | mindset | habitual way of thinking |
| 59. | mulling over | thinking about for a while |
| 60. | musing | gentle thoughtful reflection |
| 61. | notion | a general thought or idea |
| 62. | obsessing | thinking about repeatedly |
| 63. | opining | expressing or forming an opinion |
| 64. | opinion | a thought or belief |
| 65. | outlook | general way of thinking |
| 66. | perspective | particular way of thinking |
| 67. | planning | thinking ahead about actions |
| 68. | pondering | serious thinking about something |
| 69. | predicting | thinking what will happen |
| 70. | premeditation | thinking beforehand |
| 71. | preoccupation | constant occupied thinking |
| 72. | processing | thinking through information |
| 73. | projecting | thinking ahead about outcomes |
| 74. | questioning | thinking in a doubtful way |
| 75. | reasoning | logical thinking process |
| 76. | reckoning | judging or calculating mentally |
| 77. | reconsidering | thinking again about |
| 78. | reflecting | thinking carefully about |
| 79. | reflection | careful thought about something |
| 80. | review | thoughtful examination again |
| 81. | reviewing | thinking through again |
| 82. | rumination | repeated deep thinking |
| 83. | scrutiny | close critical thinking |
| 84. | sizing up | judging by quick thought |
| 85. | sorting out | thinking through confusion |
| 86. | speculating | thinking in an uncertain way |
| 87. | speculation | thought based on guessing |
| 88. | study | careful mental examination |
| 89. | supposing | thinking something may be true |
| 90. | surmising | thinking something is likely |
| 91. | taking stock | thinking carefully about situation |
| 92. | thought | the act of thinking |
| 93. | turn of mind | natural way of thinking |
| 94. | turning over | thinking through repeatedly |
| 95. | using your head | thinking sensibly |
| 96. | visualization | forming mental images |
| 97. | visualizing | seeing mentally |
| 98. | weighing | thinking about options |
| 99. | wondering | thinking with curiosity |
| 100. | working out | solving through thought |
