69 entries under hard topic. ×
| heavy(adjective, person, body, strong) | |
| severe(adjective, strong, tough, sturdy) | |
| steely(adjective, strong, tough, sturdy) | |
| thick(adjective, person, body, strong) | |
| unrelenting(adjective, strong, tough, sturdy) | |
| bitter(adjective, strong, tough, sturdy) | |
| astringent(adjective, strong, tough, sturdy) | |
| authoritarian(adjective, strong, tough, energetic) | |
| bold(sharp, determined, vigorous, noble) | |
| hard-boiled(adjective, strong, simple, tough) | |
| heady(adjective, sharp, high, rich) | |
| immovable(adjective, strong, secure, tough) | |
| indomitable(adjective, strong, great, tough) | |
| sharp(smooth, fine, smart, attractive) | |
| stark(adjective, strong, sound, tough) | |
| adamant(adjective, strong, tough, sturdy) | |
| bullheaded(adjective, strong, tough, sturdy) | |
| by the book(expression, adjective, idiom, strong) | |
| disciplinary(adjective, strong, tough, sturdy) | |
| dyed-in-the-wool(adjective, strong, tough, sturdy) |
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| APA | Smart Define. (2016). robust thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/robust/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "robust thesaurus" https://smartdefine.org/robust/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, robust thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/robust/thesaurus/synonyms>. |
| MLA | Smart Define. "robust thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/robust/thesaurus/synonyms> |