- Definitions|0
- Thesaurus|61
- Abbreviations|0
60 entries under hard topic. ×
| adamant(strong, tough, sturdy, rigid) | |
| adamantine(strong, tough, sturdy, rigid) | |
| astringent(strong, tough, sturdy, rugged) | |
| austere(strong, tough, sturdy, rugged) | |
| authoritarian(strong, tough, sturdy, rugged) | |
| bitter(strong, tough, sturdy, rugged) | |
| bullheaded(strong, tough, sturdy, rugged) | |
| by the book(expression, idiom, strong, tough) | |
| dense(strong, tough, sturdy, rigid) | |
| determined(strong, tough) | |
| disciplinary(strong, tough, sturdy, rugged) | |
| dyed-in-the-wool(strong, tough, sturdy, rugged) | |
| ferric(strong, tough, sturdy, rigid) | |
| ferrous(strong, tough, sturdy, rigid) | |
| firm(strong, tough, sturdy, rigid) | |
| flinty(strong, tough, sturdy, rugged) | |
| forbidding(strong, tough, sturdy, rugged) | |
| frowning(strong, tough, sturdy, rugged) | |
| grim(strong, tough, sturdy, rugged) | |
| hang-tough(strong, tough, sturdy, rugged) |
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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> |