328 entries under strong topic. ×
| bold(adjective, smart, energetic, vigorous) | |
| bullheaded(adjective, hard, firm, difficult) | |
| cohesive(adjective, sturdy, coherence) | |
| dauntless(adjective, determined, noble, bold) | |
| dependable(adjective, determined, careful, resolute) | |
| dogged(adjective, mean, hard, firm) | |
| doughty(determined, bold, resolute, spirited) | |
| energetic(adjective, sound, smart, heavy) | |
| gritty(adjective, lively, determined, noble) | |
| immutable(adjective, calm, rough, solid) | |
| indomitable(adjective, hard, great, difficult) | |
| intrepid(determined, noble, bold, resolute) | |
| potent(adjective, clear, sound, severe) | |
| reliable(adjective, calm, secure, firm) | |
| resilient(adjective, sturdy, flexible, robust) | |
| thick(adjective, person, set, body) | |
| aggressive(adjective, clear, severe, lively) | |
| brave(adjective, determined, noble, bold) | |
| gutsy(adjective, clear, severe, lively) | |
| hard as nails(expression, adjective, idiom, hard) |
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| APA | Smart Define. (2016). tough thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/tough/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "tough thesaurus" https://smartdefine.org/tough/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2016, tough thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/tough/thesaurus/synonyms>. |
| MLA | Smart Define. "tough thesaurus" 30 March 2016. Web. 28 September 2026. <https://smartdefine.org/tough/thesaurus/synonyms> |