69 entries under stubborn topic. ×
| unchangeable(adjective, set, hard, stiff, rigid) | |
| bound(verb, adjective, strong, tough, firm) | |
| bullhead(adjective, mean, hard, tough, harsh) | |
| callous(adjective, set, mean, strong, hard) | |
| cold fish(expression, adjective, mean, hard, unfeeling) | |
| fixed(adjective, mean, strong, hard, tough) | |
| hanging tough(expression, adjective, mean, hard, rigid) | |
| hard-and-fast(adjective, set, hard, stiff, rigid) | |
| hard-boiled(adjective, mean, hard, tough, harsh) | |
| hard-hearted(adjective, mean, hard, tough, harsh) | |
| hard-nosed(adjective, mean, hard, tough, harsh) | |
| mean(adjective, hard, tough, harsh, unfeeling) | |
| mulish(adjective, mean, strong, hard, tough) | |
| perverse(adjective, mean, hard, tough, firm) | |
| pigheaded(adjective, mean, hard, tough, firm) | |
| set in stone(expression, adjective, idiom, mean, hard) | |
| staunch(adjective, set, strong, hard, tough) | |
| stringent(adjective, set, hard, stiff, rigid) | |
| sure(adjective, strong, tough, firm, solid) | |
| thick-skinned(adjective, mean, hard, tough, harsh) |
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| APA | Smart Define. (2015). iron thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/iron/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "iron thesaurus" https://smartdefine.org/iron/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2015, iron thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/iron/thesaurus/synonyms>. |
| MLA | Smart Define. "iron thesaurus" 14 April 2015. Web. 29 September 2026. <https://smartdefine.org/iron/thesaurus/synonyms> |