159 entries under rigid topic. ×
| immalleable(adjective, hard, solid, stiff) | |
| insensible(adjective, strong, hard, tough, sturdy) | |
| iron-fisted(adjective, tough, severe, harsh) | |
| locked in(expression, adjective, secure, tough, determined) | |
| made fast(expression, secure, inflexible, stubborn) | |
| mechanical(adjective, hard, solid, stiff) | |
| no-nonsense(adjective, tough, severe, harsh, thoughtful) | |
| numbed(adjective, hard, solid, stiff) | |
| oppressive(adjective, tough, severe, harsh, cruel) | |
| quiet(calm, secure, moderate, still) | |
| rheumatic(adjective, hard, solid, stiff) | |
| scrupulous(adjective, close, tough, correct, severe) | |
| square(adjective, tough, severe, honest, harsh) | |
| stiff as a board(expression, adjective, idiom, hard, solid) | |
| straight(adjective, close, tough, correct, severe) | |
| strait-laced(adjective, tough, severe, harsh, solid) | |
| stringent(adjective, set, hard, tough, severe) | |
| unflexible(adjective, hard, tough, solid) | |
| ungraceful(adjective, hard, solid, stiff) | |
| unpermissive(adjective, tough, severe, harsh, solid) |
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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> |