| quiet(adjective, calm, dull, secure, soft) |
| sensible(adjective, sound, reasonable, moderate, firm) |
| smooth(adjective, calm, quiet, direct, right) |
| still(adjective, calm, dull, quiet, secure) |
| sty(noun, abode, uncleanness) |
| systematic(adjective, calm, smooth, steady, temperate) |
| tenacious(adjective, strong, sound, secure, tough) |
| unbroken(adjective, calm, quiet, direct, smooth) |
| undeviating(adjective, quiet, strong, direct, smooth) |
| unruffled(adjective, calm, quiet, smooth, soft) |
| unswerving(adjective, firm, solid, fixed, resolute) |
| unvaried |
| vigorous(adjective, strong, sound, complete, tough) |
| well-founded(adjective, strong, sound, secure, tough) |
| accountable |
| chronic(adjective, persistent, continuous, endless, relentless) |
| continuing(adjective, fixed, unaffected, lasting, permanent) |
| controlled(adjective, reasonable, moderate, restrained, cautious) |
| cool(adjective, calm, quiet, sound, reasonable) |
| cowshed |