| eon(noun, set, group, round) |
| cycle(noun, set, stage, series) |
| era(noun, time, set, round, period) |
| ages(noun, future, infinity, forever) |
| forever(noun, future, infinity, era) |
| years(noun, stage, era, epoch) |
| blue moon(noun, time, life, period) |
| course(noun, set, round, stage) |
| infinity(future, perpetuity, forever) |
| afterlife(noun, future, infinity, perpetuity) |
| endless time(expression, future, infinity, perpetuity) |
| endlessness(future, infinity, perpetuity, forever) |
| everlastingness(future, infinity, perpetuity, forever) |
| forever and a day(noun, expression, future, infinity) |
| future(infinity, perpetuity, forever) |
| immortality(future, infinity, perpetuity, forever) |
| imperishability(future, infinity, perpetuity, forever) |
| infiniteness(future, infinity, perpetuity, forever) |
| infinitude(future, infinity, perpetuity, forever) |
| kingdom come(expression, future, infinity, perpetuity) |