| No. | Item | Definition |
|---|---|---|
| 1. | adulthood | the state of being an adult |
| 2. | ageing | the process of growing older |
| 3. | ancient times | very old historical period |
| 4. | ancientness | the state of being very old |
| 5. | antique period | ancient historical times |
| 6. | antiquity | great age or ancient times |
| 7. | bygone days | past times |
| 8. | chapter | a distinct period in a story |
| 9. | childhood | the state of being a child |
| 10. | chronological period | a period in time order |
| 11. | chronological stage | a stage by time |
| 12. | chronology | arrangement by time |
| 13. | cycle | a recurring period |
| 14. | date | the time something is from |
| 15. | day | a particular time or era |
| 16. | days | a past time or period |
| 17. | declining years | later years of life |
| 18. | dotage | very old age, often feeble |
| 19. | duration | the time something lasts |
| 20. | Elizabethan era | period of Queen Elizabeth I |
| 21. | enlightenment | 18th-century intellectual movement |
| 22. | eon | an extremely long time |
| 23. | epoch | a notable period in history |
| 24. | era | a distinct period of time |
| 25. | former times | times in the past |
| 26. | from time immemorial | since very ancient times |
| 27. | generation | people of a similar time |
| 28. | getting older | becoming older over time |
| 29. | golden years | later years, often after retirement |
| 30. | growing older | becoming older over time |
| 31. | heyday | the peak period |
| 32. | historical era | an era in history |
| 33. | historical period | a period in history |
| 34. | hoariness | grayness from age |
| 35. | in bygone days | in past days |
| 36. | in days gone by | in past times |
| 37. | in earlier days | in earlier times |
| 38. | in former days | in earlier times |
| 39. | in olden times | in old times |
| 40. | in times past | in past times |
| 41. | infancy | the earliest stage of life |
| 42. | interval | a time between events |
| 43. | juncture | a particular point in time |
| 44. | length of service | time spent in service |
| 45. | length of time | duration of time |
| 46. | life expectancy | expected length of life |
| 47. | life period | a period in a person’s life |
| 48. | life phase | a phase in a person’s life |
| 49. | life span | the length of a life |
| 50. | life stage | a stage in a person’s life |
| 51. | lifespan | the length of a life |
| 52. | lifetime | a person’s span of life |
| 53. | longevity | long duration of life |
| 54. | maturity | state of being fully developed |
| 55. | medieval period | the Middle Ages |
| 56. | mellowing | becoming softer with time |
| 57. | Middle Ages | medieval times in Europe |
| 58. | modern era | the current historical period |
| 59. | moment | a brief time |
| 60. | number of years | count of years lived |
| 61. | olden days | times long ago |
| 62. | oldness | the state of being old |
| 63. | once upon a time | a time in the past |
| 64. | past | time before now |
| 65. | period | a length of time |
| 66. | phase | a distinct stage or period |
| 67. | point in time | a specific time |
| 68. | postwar era | period after a war |
| 69. | prime | the best or strongest period |
| 70. | Renaissance | European cultural revival period |
| 71. | ripeness | state of being mature |
| 72. | round | a cycle or period |
| 73. | season | a period in life or history |
| 74. | seniority | status from longer service |
| 75. | service | time spent working |
| 76. | span | a stretch of time |
| 77. | springtime | early period of life |
| 78. | stage | a phase in development |
| 79. | standing | status from time or rank |
| 80. | stretch | a period of time |
| 81. | teenage years | the years from 13 to 19 |
| 82. | tenure | time in a position |
| 83. | term | a fixed period of time |
| 84. | time | a particular point or era |
| 85. | timeframe | a period considered |
| 86. | timeline | a sequence of times |
| 87. | timespan | a length of time |
| 88. | twilight years | the final years of life |
| 89. | venerability | respect from great age |
| 90. | venerableness | worthiness of respect from age |
| 91. | Victorian era | period of Queen Victoria |
| 92. | vintage | the year something was made |
| 93. | wear and tear | damage from time and use |
| 94. | weathering | change from exposure over time |
| 95. | wornness | state of being worn |
| 96. | years | number of years lived |
| 97. | yesteryear | the past, long ago |
| 98. | yore | time long past |
| 99. | youth | the state of being young |
| 100. | youthfulness | the quality of being young |
