113 entries under adjective topic. ×
| undated | |
| unfortunate | |
| unpropitious | |
| unqualified | |
| unvarying | |
| lengthy | |
| amaranthine | |
| elegant | |
| ever popular(expression, immortal) | |
| invariable | |
| old time favorite(expression, idiom, immortal) | |
| trendless | |
| undeviating |
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| APA | Smart Define. (2016). timeless thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/timeless/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "timeless thesaurus" https://smartdefine.org/timeless/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, timeless thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/timeless/thesaurus/synonyms>. |
| MLA | Smart Define. "timeless thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/timeless/thesaurus/synonyms> |