- Definitions|2
- Thesaurus|675
- Abbreviations|0
74 entries under tough topic. ×
| disciplinary(adjective, strong, hard, sturdy) | |
| ferric(adjective, strong, hard, sturdy) | |
| ferrous(adjective, strong, hard, sturdy) | |
| forbidding(adjective, strong, hard, sturdy) | |
| frowning(adjective, strong, hard, sturdy) | |
| hang-tough(adjective, strong, hard, sturdy) | |
| hard-shell(adjective, strong, hard, sturdy) | |
| hard as nails(expression, adjective, idiom, set, strong) | |
| mortified(adjective, strong, hard, sturdy) | |
| rock hard(expression, adjective, strong, hard) | |
| rough(adjective, strong, hard, sturdy) | |
| serious(adjective, strong, hard, sturdy) | |
| steel(adjective, strong, hard, sturdy) | |
| tough inflexible(expression, strong, hard, sturdy) |
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| APA | Smart Define. (2015). adamantine thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/adamantine/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "adamantine thesaurus" https://smartdefine.org/adamantine/thesaurus/synonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2015, adamantine thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/adamantine/thesaurus/synonyms>. |
| MLA | Smart Define. "adamantine thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/adamantine/thesaurus/synonyms> |