207 entries under hard topic. ×
| solidified(adjective, set, solid, heavy) | |
| austere(adjective, strong, tough, severe) | |
| cemented(adjective, set, strong, secure) | |
| compacted(adjective, set, strong, solid) | |
| congealed(adjective, set, solid, heavy) | |
| jelled(adjective, set, solid, heavy) | |
| nonporous(adjective, solid, rigid, inflexible) | |
| packed(adjective, close, set, strong) | |
| physical(adjective, strong, solid, material) | |
| rocklike(adjective, strong, substantial, stiff) | |
| serious(adjective, strong, tough, severe) | |
| stiff-necked(adjective, mean, strong, tough) | |
| authoritarian(adjective, strong, tough, severe) | |
| bullheaded(adjective, strong, tough, determined) | |
| exacting(adjective, tough, severe, rough) | |
| hard-line(adjective, strong, tough, severe) | |
| hard-shelled(adjective, tough, severe, rough) | |
| hardheaded(adjective, strong, tough, determined) | |
| husky(adjective, strong, tough, fit) | |
| material(adjective, strong, solid, physical) |
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| APA | Smart Define. (2016). firm thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/firm/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "firm thesaurus" https://smartdefine.org/firm/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, firm thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/firm/thesaurus/synonyms>. |
| MLA | Smart Define. "firm thesaurus" 31 March 2016. Web. 25 September 2026. <https://smartdefine.org/firm/thesaurus/synonyms> |