104 entries under firm topic. ×
| rebellious(adjective, tough, unreasonable, grim) | |
| self-willed(adjective, tough, determined, unreasonable) | |
| sure(adjective, strong, tough, flat) | |
| unmanageable(adjective, tough, obstinate, stubborn) | |
| unshaken(adjective, strong, certain, definite) | |
| willful(adjective, tough, determined, unreasonable) | |
| balky(tough, unreasonable, grim, inflexible) | |
| bent on(expression, adjective, serious, resolute) | |
| driven(adjective, determined, serious, resolute) | |
| eager beaver(expression, adjective, strong, determined) | |
| fireball(adjective, strong, determined, steady) | |
| go-go(adjective, strong, determined, steady) | |
| grind(adjective, strong, energetic, lively) | |
| hardheaded(tough, determined, unreasonable, grim) | |
| inexhaustible(adjective, strong, certain, determined) | |
| ornery(tough, unreasonable, grim, inflexible) | |
| reiterative(adjective, usual, regular, normal) | |
| remorseless(adjective, tough, unreasonable, grim) | |
| set on(expression, adjective, serious, resolute) | |
| stiff-necked(adjective, tough, deliberate, determined) |
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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> |