| A | B |
|---|
| antiquated | Old and no longer useful or suitable; outmoded |
| centenarian | One who lives one hundred or more years. |
| contemporary | (a) Living or happening during the same period of time.(b) Current; modern |
| fledgling | (a) A young inexperienced person. (b) A young bird that has grown feathers needed for flying. |
| frail | (a) Flimsy; not strong or substantial; fragile. (b) Physically weak. |
| gerontology | The scientific study of the process and effects of aging. |
| longevity | (a) Length of life. (b) Long duration, as in an occupation. |
| nascent | Coming into existence; emerging. |
| puerile | (a) Childish; immature; silly. (b) Belonging to childhood; youthful. |
| venerable | Worthy of respect or reverence, particularly because of position. |
