100 entries under tough topic. ×
| persistent(adjective, strong, flat, firm) | |
| persevering(adjective, strong, keen, flat) | |
| staunch(adjective, good, clear, strong) | |
| unswerving(adjective, strong, firm, total) | |
| adamantine(adjective, strong, hard, severe) | |
| indomitable(adjective, strong, hard, firm) | |
| pertinacious(adjective, strong, firm, deliberate) | |
| strong-willed(adjective, strong, firm, intense) | |
| brave(adjective, clear, severe, firm) | |
| sure(adjective, good, clear, strong) | |
| dedicated(adjective, set, clear, strong) | |
| headstrong(adjective, firm, careless, deliberate) | |
| strong(adjective, good, hard, easy) | |
| purposeful(adjective, strong, keen, firm) | |
| hard(adjective, strong, severe, harsh) | |
| refractory(adjective, firm, persistent, impulsive) | |
| true(adjective, good, clear, strong) | |
| iron(adjective, strong, hard, firm) | |
| mulish(adjective, firm, resolute, impulsive) | |
| plucky(adjective, clear, severe, firm) |
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| APA | Smart Define. (2016). determined thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/determined/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "determined thesaurus" https://smartdefine.org/determined/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, determined thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/determined/thesaurus/synonyms>. |
| MLA | Smart Define. "determined thesaurus" 31 March 2016. Web. 27 September 2026. <https://smartdefine.org/determined/thesaurus/synonyms> |