- Definitions|2
- Thesaurus|443
- Abbreviations|0
| done(last, original, past, traditional, venerable) | |
| eternally | |
| eterne | |
| ever-being | |
| ever-durable | |
| ever-during | |
| everliving | |
| folk | |
| fore | |
| hackneyed(last, original, past, venerable, outdated) | |
| hallowed | |
| handed down | |
| heroic | |
| illimitable(adjective, infinite) | |
| immeasurable(adjective, infinite) | |
| immutable(lasting, permanent, everlasting, unending, undying) | |
| imperishable(vast, lasting, permanent, everlasting, unending) | |
| incalculable(adjective, infinite) | |
| incessant | |
| indefinite(lasting, permanent, everlasting, unending, undying) |
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| APA | Smart Define. (2016). immemorial thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/immemorial/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "immemorial thesaurus" https://smartdefine.org/immemorial/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, immemorial thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/immemorial/thesaurus/synonyms>. |
| MLA | Smart Define. "immemorial thesaurus" 29 February 2016. Web. 25 September 2026. <https://smartdefine.org/immemorial/thesaurus/synonyms> |