107 entries under tough topic. ×
| close(adjective, hard, solid, rigid) | |
| cold fish(expression, adjective, hard, severe) | |
| compact(adjective, set, strong, hard) | |
| concentrated(verb, adjective, set, strong, hard) | |
| concrete(adjective, set, hard, firm) | |
| crotchety(adjective, hard, severe, cruel) | |
| cruel(adjective, hard, severe, careless) | |
| deadened(adjective, hard, severe, cruel) | |
| dense(adjective, set, strong, hard) | |
| exacting(adjective, hard, severe, cruel) | |
| feelingless(adjective, hard, severe, indifferent) | |
| forbidding(adjective, person, hard, harsh) | |
| hard-as-nails(adjective, hard, unfeeling, unsympathetic) | |
| hard as nails(expression, adjective, idiom, set, strong) | |
| icy(adjective, hard, severe, cruel) | |
| impenetrable(adjective, set, strong, hard) | |
| inanimate(adjective, hard, severe, cruel) | |
| inelastic(adjective, hard, firm, solid) | |
| inhuman(adjective, hard, severe, harsh) | |
| inhumane(adjective, hard, harsh, cruel) |
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| APA | Smart Define. (2016). hardened thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/hardened/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "hardened thesaurus" https://smartdefine.org/hardened/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2016, hardened thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/hardened/thesaurus/synonyms>. |
| MLA | Smart Define. "hardened thesaurus" 29 March 2016. Web. 29 September 2026. <https://smartdefine.org/hardened/thesaurus/synonyms> |