- Definitions|2
- Thesaurus|1.3k
- Abbreviations|0
153 entries under firmness topic. ×
| rigor(rigidity, stiffness) | |
| rigorousness(rigidity, stiffness) | |
| sense of purpose(expression, idiom, determination, steadfastness) | |
| severity(rigidity, stiffness) | |
| sharpness(rigidity, stiffness) | |
| sternness(rigidity, stiffness) | |
| stiffness(drive, rigidity, strengthener) | |
| strictness(rigidity, stiffness) | |
| stringency(rigidity, stiffness) | |
| surety(noun, resolve, willpower) | |
| tenaciousness(noun, resolve, obstinacy, stubbornness) | |
| unkindness(rigidity, stiffness) | |
| valorousness(strength, determination, courage, bravery) |
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| APA | Smart Define. (2015). backbone thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/backbone/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "backbone thesaurus" https://smartdefine.org/backbone/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, backbone thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/backbone/thesaurus/synonyms>. |
| MLA | Smart Define. "backbone thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/backbone/thesaurus/synonyms> |