| smooth(adjective, direct, right, flat, solid) |
| stubborn(adjective, intense, deliberate, determined, resolute) |
| sure(adjective, strong, flat, firm, solid) |
| tenacious(adjective, strong, intense, deliberate, determined) |
| unchanged(adjective, uniformity) |
| undistorted(adjective, direct, smooth, right, solid) |
| undiversified(adjective, even, constant, rigid, inflexible) |
| unremitting(adjective, continuous) |
| unshakable |
| untiring |
| alike(adjective, uniform) |
| changeless(adjective, severe, harsh, solid, certain) |
| coherent(adjective, even, uniform, continuous, harmonious) |
| definite(adjective, strong, severe, flat, harsh) |
| horizontal(adjective, quiet, direct, smooth, right) |
| irreversible(adjective, even, rigid, inflexible, reliable) |
| literal(adjective, honest, exact, real, word) |
| nice |
| obdurate(adjective, strong, flat, harsh, certain) |
| of a piece(expression, adjective, idiom, regular, even) |