| age(noun, time, set, informal, round) | |
| aeon(noun, set, group, round) | |
| time | |
| era(noun, set, round, period, history) | |
| cycle(noun, time, set, sequence) | |
| epoch | |
| generation(noun, era) | |
| period(noun, set, group, round) | |
| ages | |
| duration | |
| years | |
| lastingness | |
| lifetime | |
| oldness | |
| time period |
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| APA | Smart Define. (2015). eon thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/eon/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "eon thesaurus" https://smartdefine.org/eon/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, eon thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/eon/thesaurus/synonyms>. |
| MLA | Smart Define. "eon thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/eon/thesaurus/synonyms> |