71 entries under hard topic. ×
| massive(deep, fat, broad, bulky) | |
| nonporous(tough, solid, rigid, inflexible) | |
| rock(adjective, strong, substantial, sturdy) | |
| rocklike(adjective, strong, substantial, sturdy) | |
| sound(adjective, strong, physical, material) | |
| stable(adjective, strong, solid, physical) | |
| thickset(deep, fat, broad, bulky) | |
| compacted(adjective, strong, substantial, sturdy) | |
| concentrated(adjective, set, tough, solid) | |
| congealed(adjective, set, tough, firm) | |
| heavy(adjective, set, tough, solid) | |
| inflexible(adjective, tough, solid, rigid) | |
| rigid(adjective, tough, correct, solid) | |
| stiff(adjective, set, tough, solid) | |
| tight(adjective, strong, substantial, compact) | |
| brick wall(expression, adjective, strong, substantial) | |
| close-grained(tough, solid, rigid, inflexible) | |
| deep(adjective, set, solid, heavy) | |
| dimensional(adjective, strong, substantial, sturdy) | |
| fine-grained(tough, solid, rigid, inflexible) |
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| APA | Smart Define. (2016). concrete thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/concrete/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "concrete thesaurus" https://smartdefine.org/concrete/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, concrete thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/concrete/thesaurus/synonyms>. |
| MLA | Smart Define. "concrete thesaurus" 31 March 2016. Web. 27 September 2026. <https://smartdefine.org/concrete/thesaurus/synonyms> |