| flattened(adjective, round) |
| flat(adjective, calm, quiet, direct, smooth) |
| flush(adjective, calm, quiet, direct, smooth) |
| even(adjective, calm, quiet, smooth, soft) |
| horizontal(adjective, calm, quiet, direct, smooth) |
| level(adjective, quiet, direct, smooth, right) |
| plane(adjective, calm, quiet, direct, smooth) |
| alike(adjective, calm, direct, smooth, right) |
| continuous(adjective, calm, quiet, direct, smooth) |
| matching(adjective, calm, direct, smooth, right) |
| parallel(adjective, calm, direct, smooth, right) |
| planar(adjective, even) |
| regular(adjective, calm, quiet, smooth, right) |
| smooth(adjective, calm, direct, right, flat) |
| stable(adjective, calm, quiet, direct, smooth) |
| steady(adjective, calm, quiet, smooth, right) |
| straight(adjective, calm, direct, smooth, right) |
| unbroken(adjective, calm, quiet, direct, smooth) |
| unfluctuating(adjective, calm, direct, smooth, right) |
| uniform(adjective, calm, quiet, smooth, right) |