| age(noun, time, informal, round) |
| aeon(noun, group, round, age) |
| era(noun, round, period, history) |
| cycle(noun, time, age, sequence) |
| period(noun, group, round, age) |
| sequel(round, sequence, series, phase) |
| sequence(round, series, phase, era) |
| succession(round, sequence, series, phase) |
| alternation(round, sequence, series, phase) |
| chain(round, sequence, series, phase) |
| circle(round, sequence, series, phase) |
| circuit(round, sequence, series, phase) |
| course(round, sequence, series, phase) |
| isochronism(round, sequence, series, phase) |
| loop(round, sequence, series, phase) |
| orbit(round, sequence, series, phase) |
| periodicity(round, sequence, series, phase) |
| phase(round, sequence, series, era) |
| progression(sequence, series) |
| revolution(round, sequence, series, phase) |