- Definitions|1
- Thesaurus|864
- Abbreviations|0
| solid(familiar, established, long-established) | |
| steady(familiar, established, long-established) | |
| strong | |
| sustaining(adjective, continuing) | |
| time-honored(familiar, established, long-established) | |
| unchanging | |
| undeviating | |
| unmitigated(persistent, continuous, lasting, continuing, remaining) | |
| unrelenting | |
| unremitting | |
| unvarying | |
| unyielding(persistent, continuous, lasting, continuing, remaining) | |
| unyoung | |
| vintage(familiar, established, long-established) |
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| APA | Smart Define. (2016). long-lived thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/long-lived/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "long-lived thesaurus" https://smartdefine.org/long-lived/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, long-lived thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/long-lived/thesaurus/synonyms>. |
| MLA | Smart Define. "long-lived thesaurus" 26 February 2016. Web. 26 September 2026. <https://smartdefine.org/long-lived/thesaurus/synonyms> |