| Main Entry: | eon |
| Part of Speech: | noun |
| Definition: | an age |
Synonyms: |
aeon, ages, time period, years |
| Main Entry: | cycle |
| Part of Speech: | noun |
| Definition: | era, phase |
Synonyms: |
aeon, age, alternation, chain, circle, circuit, course, eon, isochronism, loop, orbit, period, periodicity, revolution, rhythm, ring, rotation, round, run, sequel, sequence, series, succession, wheel |
| Notes: | a single to-and-fro movement of an air particle is called a cycle and the number of cycles that occur in a second is known as the frequency of a sound |
| Main Entry: | era |
| Part of Speech: | noun |
| Definition: | time period in history |
Synonyms: |
aeon, age, cycle, date, day, days, eon, epoch, generation, stage, term, time |
| Main Entry: | generation |
| Part of Speech: | noun |
| Definition: | era; age group |
Synonyms: |
aeon, breed, contemporaries, crop, day, days, eon, epoch, peers, period, rank, span, step, time, times |