75 entries under adjective topic. ×
| stiff(hard, firm, inflexible) | |
| inflexible(soft, firm, stiff, yielding) | |
| rigid(soft, severe, gentle, stiff) | |
| stubborn(weak, soft, firm, stiff) | |
| adamant | |
| firm(weak, obscure, uncertain, stiff) | |
| obstinate(soft, firm, determined, stiff) | |
| harsh(calm, soft, low) | |
| brittle(firm, stiff, fragile, unbreakable) | |
| unyielding(weak, firm, stiff, resolute) | |
| stern(soft, gentle, firm, stiff) | |
| severe | |
| unpliable(firm, stiff) | |
| willful(yielding, obstinate, stubborn) | |
| uncompromising | |
| hard(kind, gentle, bright) | |
| stringent(rigid, tight) | |
| unaccommodating(firm, stiff) | |
| unbendable(firm, stiff, pliable, velvety) | |
| unrelenting |
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| APA | Smart Define. (2016). flexible thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/flexible/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "flexible thesaurus" https://smartdefine.org/flexible/thesaurus/antonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, flexible thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/flexible/thesaurus/antonyms>. |
| MLA | Smart Define. "flexible thesaurus" 28 March 2016. Web. 25 September 2026. <https://smartdefine.org/flexible/thesaurus/antonyms> |