| alike(adjective, calm, direct, smooth, right) |
| bland(adjective, quiet, soft, gentle, flat) |
| continuous(adjective, calm, quiet, direct, smooth) |
| dead flat(expression, adjective, smooth, flat, even) |
| face down(verb, expression, adjective, phrasal verb, lying) |
| floor |
| horizontally |
| in line(expression, adjective, idiom, calm, smooth) |
| invariable(adjective, quiet, smooth, soft, gentle) |
| lying |
| matching(adjective, calm, direct, smooth, right) |
| planate(adjective, calm, quiet, direct, smooth) |
| reclining(adjective, smooth, low, level, lying) |
| rolled(adjective, calm, smooth, flat, plain) |
| stable(adjective, calm, quiet, direct, smooth) |
| steep(adjective, straight, upright, vertical) |
| straightforward(adjective, direct, smooth, right, solid) |
| unswerving(adjective, smooth, right, solid, level) |
| akin(adjective, calm, smooth, flat, plain) |
| alluvial |