- Definitions|0
- Thesaurus|626
- Abbreviations|0
141 entries under tough topic. ×
| bleak(adjective, severe, harsh, cruel) | |
| brutal(adjective, harsh, cruel, grim) | |
| cold(adjective, harsh, cruel, grim) | |
| cold-blooded(adjective, harsh, cruel, grim) | |
| determined(adjective, strong, hard, strong-minded) | |
| disagreeable(adjective, severe, harsh, cruel) | |
| distressing(adjective, severe, harsh, grim) | |
| dour(adjective, severe, harsh, cruel) | |
| exacting(adjective, severe, harsh, grim) | |
| ferric(adjective, strong, hard) | |
| ferrous(adjective, strong, hard) | |
| grievous(adjective, severe, harsh, cruel) | |
| grim(adjective, severe, harsh, cruel) | |
| hard-nosed(adjective, stubborn, hardened, cynical) | |
| hard-shelled(adjective, rough, hardened, cynical) | |
| harsh(adjective, cruel, grim, unfeeling) | |
| headstrong(adjective, rough, hardened, cynical) | |
| hostile(adjective, severe, harsh, cruel) | |
| implacable(adjective, strong, hard) | |
| inclement(adjective, severe, harsh, cruel) |
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| APA | Smart Define. (2015). hard as nails thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/hard_as_nails/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "hard as nails thesaurus" https://smartdefine.org/hard_as_nails/thesaurus/synonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2015, hard as nails thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/hard_as_nails/thesaurus/synonyms>. |
| MLA | Smart Define. "hard as nails thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/hard_as_nails/thesaurus/synonyms> |