- Definitions|2
- Thesaurus|1.2k
- Abbreviations|0
134 entries under firm topic. ×
| forceful(adjective, clear, strong, sound, tough) | |
| hale(adjective, strong, sound, tough, fit) | |
| incompliant(adjective, tough, difficult, wild) | |
| perverse(adjective, tough, difficult, resist) | |
| sure(adjective, strong, flat, solid) | |
| cantankerous(tough, difficult, wild, awkward) | |
| continuing(adjective, strong, determined, steady) | |
| cussed(tough, persistent, obstinate, stubborn) | |
| impregnable(adjective, true, fixed, constant) | |
| insubordinate(tough, persistent, obstinate, stubborn) | |
| intrepid(strong, tough, determined, vigorous) | |
| permanent(secure, tough, true, fixed) | |
| plodding(adjective, strong, determined, steady) | |
| plugging(adjective, strong, determined, steady) | |
| rebellious(adjective, tough, unreasonable, grim) | |
| settled(adjective, strong, secure, flat) | |
| sound(adjective, strong, secure, tough, fit) | |
| unhesitating(adjective, determined, serious, resolute) | |
| unmanageable(tough, difficult, wild, awkward) | |
| unremitting(adjective, strong, determined, steady) |
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| APA | Smart Define. (2015). tenacious thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/tenacious/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "tenacious thesaurus" https://smartdefine.org/tenacious/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, tenacious thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/tenacious/thesaurus/synonyms>. |
| MLA | Smart Define. "tenacious thesaurus" 6 November 2015. Web. 25 September 2026. <https://smartdefine.org/tenacious/thesaurus/synonyms> |