| concision |
| curtness |
| dead air(expression, calm, quiet, speech, silence) |
| death(calm, quiet, speech, silence, softness) |
| ellipsis |
| hush(calm, quiet, speech, silence, softness) |
| hush-hush(calm, quiet, speech, silence, softness) |
| inarticulateness(calm, quiet, speech, silence, softness) |
| iron curtain(expression, calm, quiet, speech, silence) |
| laconic |
| lull(calm, quiet, speech, silence, softness) |
| noiselessness(calm, quiet, speech, silence, softness) |
| pithiness |
| quiescence(calm, quiet, speech, silence, softness) |
| quiet(calm, speech, silence, softness, reticence) |
| quietness(calm, quiet, speech, silence, softness) |
| quietus(calm, quiet, speech, silence, softness) |
| reserve(calm, quiet, speech, silence, softness) |
| reticence(calm, quiet, speech, silence, softness) |
| saturninity(calm, quiet, speech, silence, softness) |