93 entries under strong topic. ×
| solid(adjective, tough, firm, certain) | |
| unbending(adjective, tough, severe, flat) | |
| dependable(adjective, tough, certain, regular) | |
| flat(adjective, certain, definite, continuous) | |
| plodding(adjective, firm, determined, steady) | |
| reliable(adjective, tough, honest, certain) | |
| serious(adjective, firm, determined, bold) | |
| unwearied(adjective, firm, energetic, determined) | |
| intransigent(adjective, tough, firm, deliberate) | |
| coherent(adjective, tough, firm, determined) | |
| plugging(adjective, firm, energetic, lively) | |
| strict(adjective, certain, definite, obstinate) | |
| sure(adjective, tough, flat, firm) | |
| unshaken(adjective, firm, certain, definite) | |
| bent(adjective, flat, intense, certain) | |
| eager beaver(expression, adjective, firm, determined) | |
| fireball(adjective, firm, determined, steady) | |
| go-go(adjective, firm, determined, steady) | |
| grind(adjective, firm, energetic, lively) | |
| hang tough(expression, certain, definite, resolved) |
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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> |