| period(noun, time, present, turn) |
| age(noun, time, present, turn) |
| cycle(noun, time, course, period) |
| aeon(noun, time, round, period) |
| eon(noun, round, period, history) |
| course(noun, time, round, period) |
| phase(noun, round, stretch, period) |
| run(round, sequence, series, phase) |
| sequence(round, series, phase) |
| succession(round, sequence, series, phase) |
| alternation(round, sequence, series, phase) |
| ring(round, sequence, series, phase) |
| sequel(round, sequence, series, phase) |
| wheel(round, sequence, series, phase) |
| chain(round, sequence, series, phase) |
| circle(round, sequence, series, phase) |
| circuit(round, sequence, series, phase) |
| isochronism(round, sequence, series, phase) |
| loop(round, sequence, series, phase) |
| orbit(noun, course, round, sequence) |