- Definitions|0
- Thesaurus|61
- Abbreviations|0
22 entries under rigid topic. ×
| adamant(strong, hard, tough, sturdy) | |
| adamantine(strong, hard, tough, sturdy) | |
| dense(strong, hard, tough, sturdy) | |
| ferric(strong, hard, tough, sturdy) | |
| ferrous(strong, hard, tough, sturdy) | |
| firm(strong, hard, tough, sturdy) | |
| hard(strong, tough, sturdy, rugged) | |
| heavy(strong, hard, tough, sturdy) | |
| immovable(strong, hard, tough, sturdy) | |
| implacable(strong, hard, tough, sturdy) | |
| indomitable(strong, hard, tough, sturdy) | |
| inexorable(strong, hard, tough, sturdy) | |
| insensible(strong, hard, tough, sturdy) | |
| obdurate(strong, hard, tough, sturdy) | |
| relentless(strong, hard, tough, sturdy) | |
| robust(strong, hard, tough, sturdy) | |
| steel(strong, hard, tough, sturdy) | |
| steely(strong, hard, tough, sturdy) | |
| strong(hard, tough, sturdy, rugged) | |
| thick(strong, hard, tough, sturdy) |
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| APA | Smart Define. (1970). tough inflexible thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/tough_inflexible/thesaurus/synonyms |
| Chicago | Smart Define. 1970. "tough inflexible thesaurus" https://smartdefine.org/tough_inflexible/thesaurus/synonyms (accessed October 1, 2026). |
| Harvard | Smart Define 1970, tough inflexible thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/tough_inflexible/thesaurus/synonyms>. |
| MLA | Smart Define. "tough inflexible thesaurus" 1 January 1970. Web. 1 October 2026. <https://smartdefine.org/tough_inflexible/thesaurus/synonyms> |