| unfaltering(adjective, firm, solid, intense, certain) |
| unflagging(adjective, persistent, perseverance) |
| unvarying(adjective, quiet, smooth, right, soft) |
| fixed(adjective, strong, severe, flat, firm) |
| homogeneous(adjective, regular, even, constant, rigid) |
| inflexible(adjective, strong, smooth, flat, harsh) |
| stable(adjective, quiet, strong, direct, smooth) |
| strict(adjective, strong, flat, honest, harsh) |
| true(adjective, strong, direct, smooth, right) |
| continuous(adjective, quiet, direct, smooth, right) |
| exact(adjective, strong, severe, honest, definite) |
| faithful |
| immutable(adjective, even, constant, rigid, inflexible) |
| indefatigable(adjective, continuous) |
| level(adjective, quiet, direct, smooth, right) |
| persevering(adjective, strong, certain, definite, perseverance) |
| precise(adjective, certain, limited, definite, inflexible) |
| right(adjective, direct, smooth, flat, solid) |
| straightforward(adjective, direct, smooth, right, solid) |
| tireless |