125 entries under determined topic. ×
| pat(adjective, firm, usual, regular) | |
| pertinacious(adjective, tough, resolute, obstinate) | |
| single-minded(adjective, tough, severe, firm, harsh) | |
| cruel(adjective, strong, hard, tough, severe) | |
| pigheaded(adjective, mean, hard, tough, firm) | |
| indurate(adjective, mean, hard, firm) | |
| persevering(adjective, tough, firm, unreasonable) | |
| pitiless(adjective, severe, harsh, cruel) | |
| bovine(adjective, resolute, obstinate, uncompromising) | |
| brass-bound(adjective, resolute, obstinate, uncompromising) | |
| bull-headed(adjective, resolute, obstinate, uncompromising) | |
| dead set(expression, adjective, tough, severe, firm) | |
| ironclad(adjective, set, hard, severe, cruel) | |
| pig-headed(adjective, resolute, obstinate, uncompromising) | |
| regular(adjective, correct, solid, exact, proper) | |
| rock-ribbed(adjective, resolute, uncompromising, unshakeable) | |
| staunch(adjective, set, hard, resolute) | |
| strong-willed(adjective, resolute, uncompromising, unshakeable) | |
| merciless(adjective, harsh, cruel, fierce) | |
| ruthless(adjective, severe, harsh, cruel) |
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| APA | Smart Define. (2015). rigid thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/rigid/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "rigid thesaurus" https://smartdefine.org/rigid/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2015, rigid thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/rigid/thesaurus/synonyms>. |
| MLA | Smart Define. "rigid thesaurus" 3 August 2015. Web. 25 September 2026. <https://smartdefine.org/rigid/thesaurus/synonyms> |