328 entries under strong topic. ×
| hardheaded(adjective, hard, determined, unreasonable) | |
| immovable(adjective, mean, hard, determined) | |
| intense(adjective, clear, complete, severe) | |
| lasting(adjective, calm, solid, steady) | |
| mulish(adjective, mean, hard, firm) | |
| permanent(adjective, calm, solid, steady) | |
| red-blooded(adjective, intense, energetic, powerful) | |
| set in stone(expression, adjective, idiom, calm, mean) | |
| spirited(adjective, energetic, powerful, lively) | |
| tireless(adjective, moving, difficult, lively) | |
| true(adjective, firm, determined, careful) | |
| unalterable(adjective, calm, rough, solid) | |
| unchangeable(adjective, calm, solid, substantial) | |
| unshakable(adjective, mean, hard, firm) | |
| Herculean(adjective, severe, difficult, powerful) | |
| Spartan(noble, bold, resolute, spirited) | |
| efficient(adjective, complete, intense, exact) | |
| forbidding(adjective, hard, severe, firm) | |
| forceful(adjective, clear, sound, severe) | |
| forcible(adjective, sound, energetic, heavy) |
For more, visit
Tough on
Power Thesaurus
| 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> |