124 entries under constant topic. ×
| hanging tough(expression, adjective, determined, resolute) | |
| hard-headed(adjective, pitiless, unyielding, endless) | |
| imperishable(stable, moral, enduring, lasting) | |
| in for the long haul(expression, idiom, stable, lasting) | |
| inexhaustible(adjective, strong, firm, certain, determined) | |
| merciless(adjective, pitiless, unyielding, endless) | |
| never-failing(adjective, strong, flat, certain, determined) | |
| neverending(adjective, resolute, living, continuous) | |
| remorseless(adjective, tough, firm, unreasonable, grim) | |
| same(adjective, certain, regular, even) | |
| set in concrete(expression, stable, enduring, lasting) | |
| set in stone(expression, idiom, stable, lasting) | |
| stiff-necked(adjective, tough, firm, deliberate, determined) | |
| tried-and-true(adjective, certain, resolute, reliable) | |
| unabated(adjective, severe, intense, pure) | |
| undeterred(adjective, strong, firm, determined, steady) | |
| unstinted(adjective, strong, firm, determined, steady) | |
| backed | |
| iron-fisted(adjective, pitiless, unyielding, endless) | |
| ironfisted |
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| APA | Smart Define. (2015). persistent thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/persistent/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "persistent thesaurus" https://smartdefine.org/persistent/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, persistent thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/persistent/thesaurus/synonyms>. |
| MLA | Smart Define. "persistent thesaurus" 1 June 2015. Web. 20 September 2026. <https://smartdefine.org/persistent/thesaurus/synonyms> |