| unfeeling(noun, adjective, mean, hard, cool) |
| callous(noun, adjective, calm, mean, hard) |
| insensitive(noun, adjective, hard, tough, severe) |
| dull(noun, insensitive) |
| hardened(noun, adjective, hard, tough, severe) |
| tough(noun, adjective, mean, hard, severe) |
| cool(adjective, calm, indifferent, restrained, steady) |
| obtuse(noun, adjective, hard, indifferent, unfeeling) |
| hard(adjective, mean, tough, severe, careless) |
| hard-boiled(noun, adjective, calm, mean, hard) |
| heartless(adjective, mean, feeling, hard, cool) |
| indifferent(adjective, calm, hard, cool, careless) |
| obdurate(adjective, hard, tough, severe, harsh) |
| stony(adjective, hard, tough, severe, careless) |
| unsympathetic(adjective, mean, hard, tough, severe) |
| cold(adjective, calm, hard, cool, tough) |
| hard-hearted(adjective, calm, mean, hard, tough) |
| pachydermatous(noun, insensitive) |
| apathetic(adjective, hard, tough, severe, careless) |
| badass |