| invariable(adjective, fixed, even, constant, rigid) |
| unchangeable(adjective, secure, certain, steady, limited) |
| immutable(adjective, set, secure, steady, fixed) |
| fixed(adjective, set, secure, certain, steady) |
| unalterable(adjective, set, secure, steady, fixed) |
| unchanging(adjective, set, regular, even, constant) |
| unvarying(adjective, set, regular, fixed, even) |
| changeless(adjective, set, certain, limited, definite) |
| constant(adjective, set, secure, steady, fixed) |
| determinate(adjective, certain, limited, definite, inflexible) |
| flat |
| immovable(adjective, fixed, stubborn) |
| inalterable(adjective, set, certain, limited, definite) |
| inert |
| inflexible(adjective, secure, certain, steady, limited) |
| irreversible(adjective, strong, fixed, normal, even) |
| methodical(adjective, even, rigid, inflexible, reliable) |
| undeviating(adjective, firm, certain, limited, definite) |
| uniform(adjective, set, regular, even, constant) |
| abiding(adjective, certain, limited, definite, inflexible) |