- Definitions|2
- Thesaurus|3k
- Abbreviations|0
561 entries under adjective topic. ×
| rigorous(strong, hard, tough, severe) | |
| harsh(mean, strong, hard, tough) | |
| iron(mean, strong, hard, tough) | |
| pertinacious(determined, resolute, obstinate, stubborn) | |
| pigheaded(mean, hard, firm, deliberate) | |
| stony(person, hard, firm, solid) | |
| unshakeable(determined, resolute, uncompromising) | |
| headstrong(strong, hard, tough, rough) | |
| steely(strong, hard, tough, firm) | |
| unalterable(set, strong, hard, secure) | |
| uncompliant(resist, determined, resolute, obstinate) | |
| unswayable(determined, resolute, rigid, obstinate) | |
| hidebound(moderate, severe, firm, determined) | |
| persistent(strong, tough, flat, firm) | |
| refractory(hard, tough, rough, firm) | |
| remorseless(harsh, resist, cruel, determined) | |
| set in stone(expression, idiom, mean, hard) | |
| solid(strong, hard, secure, smooth) | |
| unswerving(strong, smooth, tough, firm) | |
| austere(strong, hard, tough, severe) |
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| APA | Smart Define. (2016). inflexible thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/inflexible/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "inflexible thesaurus" https://smartdefine.org/inflexible/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2016, inflexible thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/inflexible/thesaurus/synonyms>. |
| MLA | Smart Define. "inflexible thesaurus" 24 March 2016. Web. 29 September 2026. <https://smartdefine.org/inflexible/thesaurus/synonyms> |