- Definitions|0
- Thesaurus|61
- Abbreviations|0
60 entries under hard topic. ×
| hard-boiled(strong, tough, sturdy, rugged) | |
| hard-core(strong, tough, sturdy, rugged) | |
| hard-line(strong, tough, sturdy, rugged) | |
| hard-nosed(strong, tough, sturdy, rugged) | |
| hard-shell(strong, tough, sturdy, rugged) | |
| hard as nails(expression, idiom, strong, tough) | |
| hardheaded(strong, tough, sturdy, rugged) | |
| harsh(strong, tough, sturdy, rugged) | |
| heavy(strong, tough, sturdy, rigid) | |
| immovable(strong, tough, sturdy, rigid) | |
| implacable(strong, tough, sturdy, rigid) | |
| indomitable(strong, tough, sturdy, rigid) | |
| inexorable(strong, tough, sturdy, rigid) | |
| inflexible(strong, tough, sturdy, rugged) | |
| insensible(strong, tough, sturdy, rigid) | |
| iron(strong, tough) | |
| mortified(strong, tough, sturdy, rugged) | |
| mulish(strong, tough, sturdy, rugged) | |
| obdurate(strong, tough, sturdy, rigid) | |
| relentless(strong, tough, sturdy, rigid) |
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| APA | Smart Define. (1970). tough inflexible thesaurus. Retrieved October 2, 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 2, 2026). |
| Harvard | Smart Define 1970, tough inflexible thesaurus, Smart Define, viewed 2 October, 2026, <https://smartdefine.org/tough_inflexible/thesaurus/synonyms>. |
| MLA | Smart Define. "tough inflexible thesaurus" 1 January 1970. Web. 2 October 2026. <https://smartdefine.org/tough_inflexible/thesaurus/synonyms> |