- Definitions|2
- Thesaurus|957
- Abbreviations|0
possible profanity
| timeless(adjective, change, endless, indefinite, enduring) | |
| eternal(adjective, change, pause, fixed, endless) | |
| everlasting(adjective, unending, undying) | |
| classic(adjective, immortal, timeless) | |
| permanent(adjective, fixed, lasting, unchanging, unchangeable) | |
| perpetual(adjective, fixed, unchanging, permanent, unchangeable) | |
| unceasing(adjective, lasting, permanent, everlasting, unending) | |
| unending | |
| aeonian | |
| ancient | |
| eonian | |
| dateless(adjective, change, constant, indefinite, enduring) | |
| immortal(adjective, constant, endless, indefinite, lasting) | |
| endless(adjective, everlasting, unending, undying) | |
| ceaseless | |
| enduring(adjective, fixed, unchanging, permanent, unchangeable) | |
| sempiternal(adjective, eternal) | |
| undying | |
| customary | |
| constant(adjective, fixed, unchanging, permanent, static) |
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| APA | Smart Define. (2016). ageless thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/ageless/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "ageless thesaurus" https://smartdefine.org/ageless/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, ageless thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/ageless/thesaurus/synonyms>. |
| MLA | Smart Define. "ageless thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/ageless/thesaurus/synonyms> |