- Definitions|2
- Thesaurus|856
- Abbreviations|0
136 entries under hard topic. ×
| rough(adjective, strong, tough, severe) | |
| sanguinary(adjective, tough, harsh, violent) | |
| set in stone(expression, adjective, idiom, mean) | |
| shameless(adjective, tough, harsh, cruel) | |
| sour(adjective, tough, harsh, grim) | |
| thick-skinned(adjective, mean, tough, harsh) | |
| tough nut to crack(expression, adjective, idiom, mean) | |
| tyrannical(adjective, tough, evil, nasty) | |
| uncontrite(adjective, tough, harsh, cruel) | |
| uncooperative(adjective, mean, tough, harsh) | |
| unimpressible(adjective, mean, tough, harsh) | |
| unkind(adjective, animal, mean, severe) | |
| unregenerate(adjective, tough, harsh, cruel) | |
| unrepenting(adjective, tough, harsh, cruel) | |
| unshakable(adjective, mean, tough, firm) | |
| unswayable(firm, determined, resolute, rigid) | |
| coldblooded(adjective, mean, harsh, cold) | |
| dense(adjective, strong, tough, sturdy) | |
| ferric(adjective, strong, tough, sturdy) | |
| ferrous(adjective, strong, tough, sturdy) |
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| APA | Smart Define. (2016). implacable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/implacable/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "implacable thesaurus" https://smartdefine.org/implacable/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, implacable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/implacable/thesaurus/synonyms>. |
| MLA | Smart Define. "implacable thesaurus" 24 March 2016. Web. 21 September 2026. <https://smartdefine.org/implacable/thesaurus/synonyms> |