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