- Definitions|0
- Thesaurus|12
- Abbreviations|0
11 entries under adjective topic. ×
| bullheaded(hard, tough, difficult, wild) | |
| locked in(expression, tough, difficult, wild) | |
| mulish(hard, tough, difficult, wild) | |
| pertinacious(hard, tough, difficult, wild) | |
| pigheaded(hard, tough, difficult, wild) | |
| willful(hard, tough, difficult, wild) | |
| astute(hard, tough, shrewd, stubborn) | |
| hardboiled(firm, shrewd, astute, immovable) | |
| intractable(hard, tough, shrewd, stubborn) | |
| levelheaded(hard, tough, shrewd, stubborn) | |
| shrewd(hard, tough, stubborn, astute) |
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| APA | Smart Define. (1970). tough-nut thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/tough-nut/thesaurus/synonyms |
| Chicago | Smart Define. 1970. "tough-nut thesaurus" https://smartdefine.org/tough-nut/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 1970, tough-nut thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/tough-nut/thesaurus/synonyms>. |
| MLA | Smart Define. "tough-nut thesaurus" 1 January 1970. Web. 27 September 2026. <https://smartdefine.org/tough-nut/thesaurus/synonyms> |