| severe |
| single(adjective, simple, clean, plain, pure) |
| smooth |
| spick-and-span(adjective, smart, elegant, straight, neat) |
| spick and span(expression, adjective, idiom, smart, neat) |
| spread out(expression, adjective, clear, free, accessible) |
| spruce(adjective, correct, smart, elegant, straight) |
| stainless(adjective, pure) |
| straightforward(adjective, succinct) |
| systematic(adjective, smart, neat, tidy, slick) |
| unalloyed(adjective, simple, clean, plain, pure) |
| unbarred(adjective, clear, free, accessible, out) |
| unbolted(adjective, clear, free, accessible, out) |
| unburdened(adjective, clear, free, raw, accessible) |
| undefiled(adjective, pure) |
| uniform(adjective, neat, tidy, thorough, organized) |
| unobstructed(adjective, clear, free, bare, accessible) |
| unplugged(adjective, clear, free, accessible, out) |
| unshut(adjective, clear, free, accessible, out) |
| unstopped(adjective, clear, free, accessible, out) |