| reasonable(adjective, calm, hard, sound, sensible) |
| rigid(adjective, mean, strong, hard, tough) |
| sane(adjective, hard, sound, reasonable, sensible) |
| savage(adjective, hard, severe, rough, harsh) |
| sensible(adjective, hard, sound, tough, reasonable) |
| set(adjective, tough, severe, firm, harsh) |
| shrewd(hard, sound, tough, reasonable, sharp) |
| soulless(adjective, hard, careless, indifferent, cruel) |
| steely(adjective, strong, hard, tough, severe) |
| stolid(noun, adjective, tough, rational, straightforward) |
| stony-hearted(adjective, cold, cruel, unfeeling, unsympathetic) |
| stubborn(adjective, mean, strong, hard, tough) |
| tough-minded(adjective, hard, sound, realistic, uncompromising) |
| toughened(noun, adjective, hard, careless, indifferent) |
| unforgiving(adjective, person, feelings, emotions, rocky) |
| unyielding(adjective, mean, strong, hard, tough) |
| abnegating(adjective, calm, sensible, dark, restrained) |
| above(adjective, indifferent, detached, distant, remote) |
| abstaining(adjective, calm, sensible, dark, restrained) |
| accustomed(adjective, hard, unfeeling, unsympathetic, hardened) |