| No. | Item | Definition |
|---|---|---|
| 1. | act | a major division of a play |
| 2. | advance | movement to a later stage |
| 3. | age | a distinct historical period |
| 4. | beginning | the first part of something |
| 5. | bit | a small part or period |
| 6. | block | a distinct unit of time or work |
| 7. | bout | a short period of activity |
| 8. | break | a pause between stages |
| 9. | breather | a short pause for rest |
| 10. | bridge period | a period linking two stages |
| 11. | build-up | a gradual increase toward a stage |
| 12. | changeover | a switch to a new stage |
| 13. | chapter | a distinct part of a story |
| 14. | chunk | a sizable part of something |
| 15. | component | a part of a larger system |
| 16. | convalescence | recovery period after illness |
| 17. | cooling-off period | a pause before continuing |
| 18. | course | the progress of events over time |
| 19. | cycle | a recurring series of stages |
| 20. | deferral | putting something off to later |
| 21. | delay | a postponement to a later time |
| 22. | development | growth through successive stages |
| 23. | developmental stage | a stage in development |
| 24. | division | a separated part or section |
| 25. | duration | the length of time something lasts |
| 26. | early stage | the beginning stage |
| 27. | element | a basic part of something |
| 28. | episode | a separate event or period |
| 29. | epoch | a notable period in time |
| 30. | era | a long, distinct period |
| 31. | evolution | gradual development through stages |
| 32. | gestation | a period of development before birth |
| 33. | growth stage | a stage in growth |
| 34. | halt | a stop in movement or progress |
| 35. | hiatus | a break in continuity |
| 36. | hold | a temporary stop or pause |
| 37. | inception | the start of something |
| 38. | incubation | a period before development shows |
| 39. | initiation | the act of beginning something |
| 40. | installment | one part delivered in a series |
| 41. | interlude | a pause between main parts |
| 42. | intermission | a break between parts |
| 43. | interval | a time between events |
| 44. | intro | an introductory part |
| 45. | introduction | the opening part |
| 46. | juncture | a particular point in time |
| 47. | kickoff | the start of an activity |
| 48. | lag | a delay between stages |
| 49. | late stage | the final stage |
| 50. | launch | the start of a new effort |
| 51. | lead time | time before something begins |
| 52. | level | a degree or stage reached |
| 53. | lull | a temporary quiet period |
| 54. | maturation stage | a stage of becoming mature |
| 55. | middle stage | the central stage |
| 56. | midpoint | the middle point of a process |
| 57. | midstage | the middle stage |
| 58. | milestone | a significant point in progress |
| 59. | module | a self-contained part of a system |
| 60. | moment | a particular time or point |
| 61. | movement | a section of a larger work |
| 62. | onset | the start of something |
| 63. | opening | the beginning stage of something |
| 64. | outset | the beginning point |
| 65. | part | a piece of a whole |
| 66. | period | a length of time |
| 67. | piece | a part of something larger |
| 68. | pivot | a shift to a new direction |
| 69. | point | a particular moment or stage |
| 70. | portion | a part of a whole |
| 71. | process stage | a step in a process |
| 72. | progression | a series of developing stages |
| 73. | ramp-up | a gradual rise to a new stage |
| 74. | recess | a break in proceedings |
| 75. | recovery period | time to recover between stages |
| 76. | respite | a short break from activity |
| 77. | round | one stage in a series |
| 78. | run | a continuous period of activity |
| 79. | season | a recurring time period |
| 80. | shift | a period of scheduled work |
| 81. | slot | an allotted time period |
| 82. | span | a stretch of time |
| 83. | spell | a short period of time |
| 84. | stage | a distinct part of a process |
| 85. | step | one part in a sequence |
| 86. | stint | a period of work or duty |
| 87. | stretch | a continuous period of time |
| 88. | term | a fixed period of time |
| 89. | time | a period or point in time |
| 90. | timeframe | the time period considered |
| 91. | timeout | a brief pause in activity |
| 92. | transition | a change from one stage to another |
| 93. | turn | one in a sequence of stages |
| 94. | turnaround | a change to a new direction |
| 95. | turning point | a decisive moment in a process |
| 96. | unit | a single part of a whole |
| 97. | waiting period | a required time before action |
| 98. | watch | a period of duty or guard |
| 99. | wind-up | a lead-in to a main stage |
| 100. | window | a limited time for action |