| uniform(adjective, calm, strong, secure, firm) |
| unvarying(adjective, calm, strong, secure, firm) |
| immovable(adjective, set, hard, steady, regular) |
| stubborn(adjective, determined, steady, definite, fixed) |
| set(adjective, calm, strong, severe, fixed) |
| unchanged |
| confirmed(adjective, hard, severe, rough, harsh) |
| ironclad(adjective, set, hard, fixed, stiff) |
| obstinate(adjective, hard, determined, fixed, inflexible) |
| resolute(adjective, calm, strong, hard, definite) |
| undeviating(adjective, strong, severe, flat, harsh) |
| determined(adjective, severe, definite, stiff, necessary) |
| eternal(adjective, fixed, persistent, continuous, endless) |
| final |
| inexorable(adjective, hard, severe, stiff, inflexible) |
| unwavering(adjective, calm, strong, definite, fixed) |
| adamant(adjective, strong, hard, definite, fixed) |
| inelastic(adjective, inelastic) |
| inevitable(adjective, certain, fixed, expected, predictable) |
| intractable(adjective, hard, determined, fixed, inflexible) |