- Definitions|2
- Thesaurus|899
- Abbreviations|0
185 entries under strong topic. ×
| hard-line(adjective, hard, tough, difficult) | |
| obdurate(adjective, hard, tough, difficult) | |
| spunky(adjective, bold, resolute, spirited) | |
| strict(adjective, hard, tough, resolute) | |
| vigorous(adjective, powerful, determined, noble) | |
| adamant(adjective, hard, tough, determined) | |
| audacious(tough, bold, spirited, brave) | |
| daring(adjective, bold, resolute, spirited) | |
| dedicated(adjective, firm, determined, steady) | |
| gallant(adjective, tough, determined, noble) | |
| hard-shell(adjective, hard, tough, persistent) | |
| hardy(adjective, tough, powerful, bold) | |
| immovable(adjective, hard, tough, difficult) | |
| implacable(adjective, set, hard, tough) | |
| plodding(adjective, firm, determined, steady) | |
| plugging(adjective, firm, determined, steady) | |
| serious(adjective, hard, tough, resolute) | |
| severe(adjective, hard, tough, persistent) | |
| steely(adjective, set, hard, tough) | |
| stouthearted(bold, resolute, persistent, spirited) |
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| APA | Smart Define. (2015). indomitable thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/indomitable/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "indomitable thesaurus" https://smartdefine.org/indomitable/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, indomitable thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/indomitable/thesaurus/synonyms>. |
| MLA | Smart Define. "indomitable thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/indomitable/thesaurus/synonyms> |