| adamant(adjective, tough, firm, determined, resolute) |
| contrary(adjective, tough, cross, stupid, awkward) |
| tenacious(adjective, tough, firm, resist, awkward) |
| ungovernable(adjective, mean, tough, difficult, passionate) |
| uncompromising(adjective, tough, firm, determined, resolute) |
| uncontrollable(adjective, mean, hard, severe, rough) |
| wayward(adjective, negative, hostile, contrary, stubborn) |
| bullheaded(adjective, tough, firm, resist, determined) |
| pertinacious(adjective, strong, tough, firm, difficult) |
| violent(adjective, mean, hard, severe, rough) |
| hardheaded(adjective, strong, tough, firm, resist) |
| opinionated(adjective, tough, firm, violent, wild) |
| stiff-necked(adjective, tough, firm, resist, determined) |
| strong-willed(adjective, determined, resolute, tenacious) |
| resolute(adjective, hard, tough, sharp, firm) |
| stiff(adjective, hard, severe, rough, harsh) |
| bold(adjective, careless, anxious, worried, resolute) |
| business-minded |
| hard(adjective, sharp, determined, resolute, stubborn) |
| immovable(adjective, tough, determined, resolute, stubborn) |