113 entries under adjective topic. ×
| innumerable | |
| inopportune | |
| instantaneous | |
| intrusive | |
| long(endless, incessant, ceaseless) | |
| long-drawn-out(endless, incessant, ceaseless) | |
| termless(vast, lasting, infinite, permanent) | |
| unfavorable | |
| unlucky | |
| bottomless | |
| confirmed | |
| continuing | |
| countless | |
| deep | |
| deep-rooted | |
| deep-seated | |
| deep in thought | |
| entrenched | |
| extended | |
| far |
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| APA | Smart Define. (2016). timeless thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/timeless/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "timeless thesaurus" https://smartdefine.org/timeless/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, timeless thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/timeless/thesaurus/synonyms>. |
| MLA | Smart Define. "timeless thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/timeless/thesaurus/synonyms> |