- Definitions|1
- Thesaurus|487
- Abbreviations|0
| bent(adjective, firm, determined, usual, regular) | |
| beyond question(expression, set, certain, unquestionable, indisputable) | |
| binding(adjective, severe, harsh, stiff, rigid) | |
| bookish(adjective, character, behavior, pedant) | |
| bound and determined | |
| brick-wall(adjective, severe, stiff, rigid, tight) | |
| bulletproof | |
| by the book(expression, adjective, idiom, severe, harsh) | |
| by the numbers(expression, adjective, idiom, severe, harsh) | |
| can bet on it(expression, set, certain, unquestionable, indisputable) | |
| casemated | |
| castellated | |
| ceremonious(adjective, character, behavior, pedant) | |
| compelling(adjective, severe, harsh, stiff, rigid) | |
| concluded(adjective, firm, determined, usual, regular) | |
| confining(adjective, severe, harsh, stiff, rigid) | |
| convincing(adjective, severe, harsh, certain, stiff) | |
| cortical | |
| covered | |
| covering |
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| APA | Smart Define. (2015). ironclad thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/ironclad/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "ironclad thesaurus" https://smartdefine.org/ironclad/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, ironclad thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/ironclad/thesaurus/synonyms>. |
| MLA | Smart Define. "ironclad thesaurus" 13 April 2015. Web. 28 September 2026. <https://smartdefine.org/ironclad/thesaurus/synonyms> |