207 entries under hard topic. ×
| numbed(adjective, solid, stiff, rigid) | |
| rheumatic(adjective, solid, stiff, rigid) | |
| rock-hard(adjective, solid, compact, dense) | |
| steeled(adjective, set, strong, solid) | |
| stiff as a board(expression, adjective, idiom, solid) | |
| stringent(adjective, set, tough, severe) | |
| thick-skinned(adjective, mean, tough, harsh) | |
| tough nut to crack(expression, adjective, idiom, mean) | |
| unassailable(adjective, clear, sound, plain) | |
| uncompassionate(adjective, mean, tough, harsh) | |
| unemotional(mean, harsh, cold, indifferent) | |
| unfeeling(adjective, mean, tough, severe) | |
| unflexible(adjective, tough, solid, rigid) | |
| ungraceful(adjective, solid, stiff, rigid) | |
| unimpressible(adjective, mean, tough, harsh) | |
| unsparing(adjective, strong, tough, severe) | |
| unsupple(adjective, solid, stiff, rigid) | |
| violent(adjective, clear, tough, severe) | |
| wooden(adjective, solid, stiff, rigid) | |
| bitter(adjective, strong, tough, severe) |
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| APA | Smart Define. (2016). firm thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/firm/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "firm thesaurus" https://smartdefine.org/firm/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, firm thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/firm/thesaurus/synonyms>. |
| MLA | Smart Define. "firm thesaurus" 31 March 2016. Web. 26 September 2026. <https://smartdefine.org/firm/thesaurus/synonyms> |