- Definitions|2
- Thesaurus|443
- Abbreviations|0
57 entries under adjective topic. ×
| everlasting | |
| fixed(old, ancient) | |
| hoary | |
| of yore(expression, idiom, original, old) | |
| perpetual | |
| conventional | |
| forever(old, vast, lasting, permanent) | |
| infinite | |
| interminable | |
| long-standing(old, ancient) | |
| prescriptive | |
| antiquated(last, original, past, venerable) | |
| constant | |
| continual | |
| elderly | |
| lasting(vast, permanent, everlasting, unending) | |
| obsolete(last, original, previous, other) | |
| primordial(last, original, past, primitive) | |
| pristine(last, original, primitive, venerable) | |
| sempiternal |
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| APA | Smart Define. (2016). immemorial thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/immemorial/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "immemorial thesaurus" https://smartdefine.org/immemorial/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, immemorial thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/immemorial/thesaurus/synonyms>. |
| MLA | Smart Define. "immemorial thesaurus" 29 February 2016. Web. 26 September 2026. <https://smartdefine.org/immemorial/thesaurus/synonyms> |