754 entries under adjective topic. ×
| strong(hard, tough, strain, firm) | |
| stable(secure, strain, firm, still) | |
| severe(strong, hard, tough, correct) | |
| sound(strain, firmness, labour, conformity) | |
| consistent(strain, fixed, firmness, even) | |
| unfluctuating(strain, still, fixed, firmness) | |
| strict(good, strong, hard, tough) | |
| insistent(determined, resolute, obstinate, uncompromising) | |
| adamant(mean, strong, hard, tough) | |
| obstinate(mean, hard, tough, moderate) | |
| harsh(mean, strong, hard, tough) | |
| unshakable(mean, hard, determined, unreasonable) | |
| stern(hard, tough, easy, severe) | |
| unbendable(firm, resist, determined, unreasonable) | |
| rigorous(strong, hard, tough, correct) | |
| tight(close, strong, secure, severe) | |
| unalterable(severe, strain, harsh, cruel) | |
| invariable(severe, strain, fixed, stiff) | |
| refractory(hard, tough, strain, firm) | |
| stationary(strain, fixed, firmness, labour) |
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| APA | Smart Define. (2015). rigid thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/rigid/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "rigid thesaurus" https://smartdefine.org/rigid/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, rigid thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/rigid/thesaurus/synonyms>. |
| MLA | Smart Define. "rigid thesaurus" 3 August 2015. Web. 24 September 2026. <https://smartdefine.org/rigid/thesaurus/synonyms> |