16 entries under stiff topic. ×
| inflexible(adjective, soft, firm, yielding) | |
| rigid(adjective, soft, severe, gentle) | |
| stubborn(adjective, weak, soft, firm) | |
| firm(adjective, weak, obscure, uncertain) | |
| obstinate(adjective, soft, firm, determined) | |
| brittle(adjective, firm, fragile, unbreakable) | |
| unyielding(adjective, weak, firm, resolute) | |
| stern(adjective, soft, gentle, firm) | |
| unpliable(adjective, firm) | |
| unaccommodating(adjective, firm) | |
| unbendable(adjective, firm, pliable, velvety) | |
| wooden(adjective, inflexible) | |
| unadaptable(adjective, soft, firm, yielding) | |
| ornery(adjective, firm) | |
| resistant(adjective, firm) | |
| unresponsive(adjective, firm) |
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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> |