| barbarity(noun, torture, cruelty, harshness, malice) |
| bloodthirstiness(noun, torture, cruelty, harshness, malice) |
| callus |
| cold-bloodedness(noun, cruelty, harshness, unkindness, insensitivity) |
| coolness(insensitivity, coldness, unfriendliness) |
| disaffinity |
| emotionlessness(noun, insensitivity, roughness, coldness, unfriendliness) |
| ferocity(noun, torture, cruelty, harshness, malice) |
| fiendishness(noun, torture, cruelty, harshness, malice) |
| grimness(noun, discipline, firmness, severity, harshness) |
| hard feelings |
| harshness(noun, discipline, firmness, severity, cruelty) |
| hostility |
| indifference(noun, insensitivity, coldness, unfriendliness, taciturnity) |
| induration |
| inhumanity(noun, torture, cruelty, harshness, malice) |
| insensitiveness(noun, torture, cruelty, harshness, malice) |
| lack of remorse(expression, idiom, brazenness) |
| rigidity(noun, discipline, firmness, severity, harshness) |
| rigor(noun, discipline, firmness, severity, harshness) |