| soft(adjective, calm, quiet, light, smooth) |
| solemn |
| stable(adjective, calm, quiet, smooth, soft) |
| stagnant(adjective, calm, quiet, smooth, shy) |
| stationary(adjective, calm, quiet, smooth, tranquil) |
| still as death(expression, idiom, quiescence) |
| stilly |
| stoic |
| stony(adjective, indifferent, nonchalant, undaunted, unworried) |
| unbothered(adjective, indifferent, nonchalant, undaunted, unworried) |
| unflustered(adjective, calm, cool, steady, peaceful) |
| uninterested(adjective, indifferent, nonchalant, undaunted, unworried) |
| unstirring(adjective, calm, quiet, smooth, tranquil) |
| unsympathetic(adjective, indifferent, nonchalant, undaunted, unworried) |
| unvexed(calm, tranquil) |
| windless(adjective, quiet, cool, smooth, mild) |
| airy(adjective, feature, state, trait) |
| all quiet(expression, calm, quiet, friendly, serene) |
| amiable(adjective, calm, quiet, cool, moderate) |
| amicable(adjective, calm, quiet, cool, smooth) |