| Main Entry: | |
| Part of Speech: | noun |
| Definition: | an age |
| Synonyms: | aeon, ages, time period, years |
| 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 |
| Notes: | epoch applies to the beginning of a new period marked by radical changes and new developments - while era applies to the entire period; age denotes a period identified with some dominant personality or characteristic and period pertains to any portion of 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 |