| resting(calm, peaceful, tranquil) |
| sane |
| secluded(adjective, shy, stable, peaceful, tranquil) |
| sensible(adjective, calm, relaxed, alert, tranquil) |
| sequestered(adjective, shy, stable, peaceful, tranquil) |
| soft(adjective, calm, quiet, reasonable, easy) |
| stagnant(adjective, calm, quiet, smooth, shy) |
| stationary(adjective, calm, quiet, smooth, tranquil) |
| still as death(expression, idiom, quiescence) |
| stilly |
| stoic(adjective, cool, blank, aloof, unemotional) |
| tame(calm, easy, relaxed, comfortable, moderation) |
| unchanged(adjective, calm, restrained, unconcerned, subdued) |
| unchanging(calm, smooth, steady, temperate, composed) |
| undeviating(adjective, quiet, soft, gentle, flat) |
| uniform(adjective, calm, quiet, smooth, soft) |
| uninterested(adjective, indifferent, unsympathetic, inattentive, nonchalant) |
| unstirring(adjective, calm, quiet, smooth, tranquil) |
| unvarying(adjective, calm, quiet, smooth, soft) |
| unwrinkled(adjective, smooth) |