| cold-hearted(adjective, unfeeling, unsympathetic, uncaring, insensitive) |
| coldblooded(adjective, careless, apathetic, unsympathetic, insensitive) |
| compact(adjective, set, strong, hard, firm) |
| compacted(adjective, set, strong, hard, firm) |
| compressed(adjective, set, strong, hard, firm) |
| concentrated(adjective, set, strong, hard, firm) |
| consolidated(adjective, set, strong, hard, firm) |
| cool(adjective, blank, aloof, unemotional, serene) |
| cynical(adjective, hard, unfeeling, unsympathetic, stubborn) |
| deadpan(adjective, blank, unemotional, emotionless, expressionless) |
| dense(adjective, set, strong, hard, firm) |
| dispassionate(adjective, cool, blank, aloof, unemotional) |
| durable(adjective, firm, stiff, rigid) |
| expressionless(adjective, blank, unemotional, emotionless, inexpressive) |
| hard-edged(adjective, stubborn, hardened, toughened, cynical) |
| hard-handed(adjective, set, strong, hard, compact) |
| hard-nosed(adjective, hard, unfeeling, unsympathetic, stubborn) |
| hardboiled(adjective, careless, cruel, apathetic, callous) |
| imperturbable(adjective, cool, blank, aloof, unemotional) |
| iron(adjective, set, strong, hard, firm) |