128 entries under heartless topic. ×
| stiff(adjective, feature, state, characteristic, tough) | |
| tough(adjective, person, dull, mean, body) | |
| severe(adjective, nature, mean, strong, tough) | |
| unyielding(adjective, mean, strong, tough, easy) | |
| cruel(adjective, person, mean, strong, cool) | |
| harsh(adjective, mean, strong, cool, tough) | |
| inflexible(adjective, characteristic, mean, strong, tough) | |
| stubborn(adjective, characteristic, quality, mean, strong) | |
| stern(adjective, person, mean, tough, easy) | |
| unsympathetic(adjective, person, mean, cool, tough) | |
| callous(adjective, mean, cool, tough, severe) | |
| adamant(adjective, mean, strong, tough, rough) | |
| obdurate(adjective, mean, strong, cool, tough) | |
| unfeeling(adjective, person, mean, cool, tough) | |
| cold(adjective, person, mean, clear, cool) | |
| brutal(adjective, person, mean, tough, severe) | |
| grim(adjective, person, mean, strong, tough) | |
| stony(adjective, mean, cool, tough, severe) | |
| merciless(adjective, mean, tough, severe, evil) | |
| insensitive(adjective, person, mean, cool, tough) |
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| APA | Smart Define. (2016). hard thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/hard/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "hard thesaurus" https://smartdefine.org/hard/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, hard thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/hard/thesaurus/synonyms>. |
| MLA | Smart Define. "hard thesaurus" 24 March 2016. Web. 25 September 2026. <https://smartdefine.org/hard/thesaurus/synonyms> |