78 entries under relentless topic. ×
| chronic(adjective, continue, usual, regular, routine) | |
| eternal(adjective, continue, certain, pause, steady) | |
| habitual(adjective, common, usual, steady, regular) | |
| inflexible(adjective, strong, tough, flat, firm) | |
| obdurate(adjective, strong, tough, flat, firm) | |
| uninterrupted(adjective, continue, steady, regular, even) | |
| abiding(adjective, strong, tough, continue, flat) | |
| persisting(adjective, strong, tough, firm, determined) | |
| regular(adjective, usual, steady, routine, normal) | |
| single-minded(adjective, tough, intense, deliberate, determined) | |
| immutable(adjective, strong, firm, stable, constant) | |
| unchanging(adjective, firm, certain, steady, stable) | |
| everlasting(adjective, continue, steady, stable, constant) | |
| unbroken(adjective, severe, pure, steady, regular) | |
| adamant(adjective, strong, tough, flat, firm) | |
| inexorable(adjective, tough, determined, unreasonable, grim) | |
| unvarying(adjective, steady, regular, even, constant) | |
| uniform(adjective, steady, regular, even, constant) | |
| even(adjective, steady, regular, constant, uniform) | |
| monotonous(adjective, common, regular, normal, constant) |
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| APA | Smart Define. (2015). persistent thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/persistent/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "persistent thesaurus" https://smartdefine.org/persistent/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, persistent thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/persistent/thesaurus/synonyms>. |
| MLA | Smart Define. "persistent thesaurus" 1 June 2015. Web. 21 September 2026. <https://smartdefine.org/persistent/thesaurus/synonyms> |