| serious(adjective, calm, relaxed, tranquil, easygoing) |
| settled(adjective, strong, easy, certain, definite) |
| shoo-in(adjective, strong, easy, solid, certain) |
| slackened |
| slow(adjective, calm, quiet, light, smooth) |
| smooth(adjective, calm, quiet, light, simple) |
| snug(adjective, calm, quiet, light, smooth) |
| soft(adjective, calm, quiet, light, smooth) |
| soothed(adjective, calm, soft, relaxed, loose) |
| soothing(adjective, calm, quiet, easy, mild) |
| spontaneous(adjective, calm, quiet, light, smooth) |
| stable(adjective, calm, strong, easy, relaxed) |
| staid(adjective, calm, relaxed, tranquil, easygoing) |
| steadfast(adjective, strong, easy, certain, definite) |
| stretched out(expression, adjective, calm, quiet, relaxing) |
| substantial(adjective, calm, quiet, light, smooth) |
| successful(adjective, calm, quiet, light, smooth) |
| suppressed(adjective, calm, relaxed, tranquil, easygoing) |
| sure of oneself(expression, adjective, idiom, calm, relaxed) |
| sure thing(expression, adjective, strong, easy, certain) |