- Definitions|2
- Thesaurus|3k
- Abbreviations|0
97 entries under persistent topic. ×
| steadfast(adjective, strong, secure, tough, flat) | |
| tough(adjective, mean, strong, hard, severe) | |
| implacable(adjective, mean, strong, hard, tough) | |
| dogged(adjective, mean, strong, hard, tough) | |
| mulish(adjective, mean, strong, hard, tough) | |
| strict(adjective, strong, hard, tough, moderate) | |
| unwavering(adjective, strong, secure, flat, firm) | |
| grim(adjective, strong, hard, tough, severe) | |
| rigorous(adjective, strong, hard, tough, severe) | |
| harsh(adjective, mean, strong, hard, tough) | |
| iron(adjective, mean, strong, hard, tough) | |
| pigheaded(adjective, mean, hard, firm, deliberate) | |
| remorseless(adjective, harsh, resist, cruel, determined) | |
| solid(adjective, strong, hard, secure, smooth) | |
| unswerving(adjective, strong, smooth, tough, firm) | |
| staunch(adjective, strong, tough, flat, firm) | |
| stringent(adjective, hard, severe, rough, difficult) | |
| unforgiving(adjective, person, hard, rough, harsh) | |
| brassbound(adjective, resist, determined, resolute) | |
| merciless(adjective, person, hard, rough, harsh) |
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| APA | Smart Define. (2016). inflexible thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/inflexible/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "inflexible thesaurus" https://smartdefine.org/inflexible/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, inflexible thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/inflexible/thesaurus/synonyms>. |
| MLA | Smart Define. "inflexible thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/inflexible/thesaurus/synonyms> |