| hidebound(adjective, determined, stiff, resolute, obstinate) |
| indurate(adjective, mean, hard, determined, resolute) |
| inert(adjective, still, passive, motionless, stationary) |
| monolithic(adjective, massive) |
| permanent(adjective, secure, firm, true, steady) |
| pig-headed(adjective, determined, resolute, obstinate, stubborn) |
| realty |
| rebellious(adjective, inflexible, obstinate, willful) |
| rock-ribbed(adjective, determined, resolute, uncompromising, unshakeable) |
| sedate(adjective, calm, cool, firm, solid) |
| strict(adjective, set, strong, hard, tough) |
| strong(adjective, hard, secure, tough, solid) |
| strong-willed(adjective, determined, resolute, uncompromising, unshakeable) |
| tight(adjective, strong, secure, firm, solid) |
| unchanging(adjective, set, firm, solid, still) |
| ungovernable(adjective, tough, difficult, obstinate, stubborn) |
| unsympathetic(adjective, mean, hard, tough, harsh) |
| willful(adjective, difficult, determined, resolute, stubborn) |
| austere(adjective, strong, hard, tough, sturdy) |
| balanced(adjective, firm, solid, stable, fixed) |