127 entries under hard topic. ×
| tight(adjective, strong, substantial, compact) | |
| unbending(adjective, strong, tough, severe) | |
| unsparing(adjective, strong, tough, severe) | |
| adamant(adjective, strong, tough, sturdy) | |
| astringent(adjective, strong, tough, severe) | |
| authoritarian(adjective, strong, tough, sturdy) | |
| brick wall(expression, adjective, strong, substantial) | |
| bullheaded(adjective, strong, tough, sturdy) | |
| by the book(expression, adjective, idiom, strong) | |
| close-grained(tough, solid, rigid, inflexible) | |
| determined(adjective, strong, tough) | |
| dimensional(adjective, strong, substantial, compact) | |
| disciplinary(adjective, strong, tough, sturdy) | |
| dyed-in-the-wool(adjective, strong, tough, sturdy) | |
| ferric(adjective, strong, tough, sturdy) | |
| ferrous(adjective, strong, tough, sturdy) | |
| fine-grained(tough, solid, rigid, inflexible) | |
| flinty(adjective, strong, tough, severe) | |
| frowning(adjective, upset, strong, tough) | |
| frozen(adjective, compact, dense, rock-hard) |
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| APA | Smart Define. (2016). heavy thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/heavy/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "heavy thesaurus" https://smartdefine.org/heavy/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, heavy thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/heavy/thesaurus/synonyms>. |
| MLA | Smart Define. "heavy thesaurus" 25 January 2016. Web. 26 September 2026. <https://smartdefine.org/heavy/thesaurus/synonyms> |