| No. | Item | Definition |
|---|---|---|
| 1. | abrupt | sudden and quick |
| 2. | active | moving or acting quickly |
| 3. | adaptable | quick to adjust |
| 4. | adroit | quick and skillful |
| 5. | agile | able to move quickly |
| 6. | alert | quick to notice and respond |
| 7. | apace | swiftly |
| 8. | at once | immediately |
| 9. | bolting | moving suddenly and quickly |
| 10. | breakneck | dangerously fast |
| 11. | bright | quick to understand things |
| 12. | brisk | quick and energetic |
| 13. | businesslike | quick and practical |
| 14. | bustling | moving quickly and busily |
| 15. | clear-headed | thinking quickly and sensibly |
| 16. | clever | quick to learn or think |
| 17. | cursory | quick and not thorough |
| 18. | darting | moving suddenly and quickly |
| 19. | dashing | moving quickly and stylishly |
| 20. | deft | skillful and quick |
| 21. | dexterous | skillful with quick movements |
| 22. | directly | at once |
| 23. | dynamic | full of energy and movement |
| 24. | efficient | working quickly with little waste |
| 25. | energetic | showing active quick energy |
| 26. | expeditious | done efficiently and quickly |
| 27. | express | very fast or direct |
| 28. | expressway-fast | very fast |
| 29. | fast | moving or happening rapidly |
| 30. | flash | happening very quickly |
| 31. | flat-out | as fast as possible |
| 32. | fleet | moving very fast |
| 33. | flexible | quick to adapt |
| 34. | flying | moving very fast |
| 35. | full-tilt | at top speed |
| 36. | glancing | touching or moving quickly |
| 37. | hair-trigger | quick to react |
| 38. | hasty | done with excessive speed |
| 39. | headlong | done with reckless speed |
| 40. | high-speed | moving very fast |
| 41. | hopping | moving quickly about |
| 42. | hotheaded | quick to react angrily |
| 43. | hurried | done in a rush |
| 44. | hustling | moving or working quickly |
| 45. | immediate | happening at once |
| 46. | impetuous | acting with sudden speed |
| 47. | impulsive | acting quickly without thought |
| 48. | in no time | very soon or quickly |
| 49. | instant | occurring without delay |
| 50. | instantaneous | happening immediately |
| 51. | instantly | immediately |
| 52. | keen | mentally quick and alert |
| 53. | light-footed | moving quickly and lightly |
| 54. | lightning-fast | extremely fast |
| 55. | mercurial | quick and changeable |
| 56. | neat | quick and skillful |
| 57. | next-day | done by the following day |
| 58. | nimble | quick and light in movement |
| 59. | nippy | quick and brisk |
| 60. | nonstop | without pauses or delays |
| 61. | offhand | done without much thought |
| 62. | on the ball | quick and alert |
| 63. | on the double | very quickly |
| 64. | overnight | happening very quickly |
| 65. | peppy | lively and energetic |
| 66. | perceptive | quick to notice details |
| 67. | perfunctory | done quickly with little care |
| 68. | posthaste | with great speed |
| 69. | precipitate | done too quickly |
| 70. | prompt | done without delay |
| 71. | promptly done | completed without delay |
| 72. | racing | moving very fast |
| 73. | rapid | very fast in speed or rate |
| 74. | rapidly | at high speed |
| 75. | rash | acting too quickly |
| 76. | reactive | responding quickly |
| 77. | ready | prepared to act quickly |
| 78. | responsive | reacting quickly and readily |
| 79. | right away | immediately |
| 80. | slick | smooth and quick |
| 81. | snappy | quick and lively |
| 82. | speedily | quickly |
| 83. | speedy | done or moving quickly |
| 84. | sprightly | lively and quick-moving |
| 85. | spry | active and quick-moving |
| 86. | straightaway | without delay |
| 87. | sudden | happening quickly and unexpectedly |
| 88. | swift | happening with great speed |
| 89. | swiftly | in a quick manner |
| 90. | tearing | moving very fast |
| 91. | trigger-happy | too quick to act |
| 92. | turbo | very fast or accelerated |
| 93. | versatile | able to adjust quickly |
| 94. | vivacious | lively and quick |
| 95. | volatile | quick to change |
| 96. | whip-fast | very fast |
| 97. | whirlwind | very fast and energetic |
| 98. | wide-awake | fully alert and quick |
| 99. | zippy | fast and lively |
| 100. | zooming | moving very fast |