71 entries under hard topic. ×
| solid(adjective, set, tough, correct) | |
| substantial(adjective, body, tough, solid) | |
| firm(noun, verb, adjective, close, set) | |
| material(noun, adjective, body, strong) | |
| physical(adjective, body, strong, solid) | |
| set(verb, adjective, close, strong) | |
| dense(adjective, set, tough, solid) | |
| compact(verb, adjective, close, set) | |
| compressed(adjective, set, tough, firm) | |
| strong(adjective, set, firm, physical) | |
| thick(adjective, set, strong, tough) | |
| close(verb, adjective, set, tough) | |
| unyielding(adjective, set, tough, firm) | |
| impenetrable(adjective, set, tough, solid) | |
| solidified(adjective, set, tough, firm) | |
| tough(adjective, solid, rigid, inflexible) | |
| condensed(adjective, set, tough, solid) | |
| consolidated(adjective, set, firm, solid) | |
| fixed(adjective, set, strong, solid) | |
| impermeable(solid, rigid, density) |
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| APA | Smart Define. (2016). concrete thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/concrete/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "concrete thesaurus" https://smartdefine.org/concrete/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, concrete thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/concrete/thesaurus/synonyms>. |
| MLA | Smart Define. "concrete thesaurus" 31 March 2016. Web. 25 September 2026. <https://smartdefine.org/concrete/thesaurus/synonyms> |