| silent(adjective, close, quiet, smooth, soft) |
| noiseless(adjective, close, quiet, smooth, soft) |
| still(adjective, adverb, calm, close, quiet) |
| hushed(adjective, close, quiet, smooth, soft) |
| quiet(adjective, close, smooth, soft) |
| inaudible(adjective, close, quiet, soft) |
| mum(adjective, quiet, soft, still) |
| mute(adjective, close, quiet, soft) |
| dumb(adjective, close, quiet, soft) |
| muted(adjective, close, quiet, soft) |
| voiceless(adjective, quiet, soft, still) |
| muffled(adjective, close, quiet, soft) |
| quiescent(adjective, close, quiet, soft) |
| soft(adjective, close, quiet, peaceful) |
| unhearable(quiet, soft) |
| unuttered(adjective, close, quiet, soft) |
| whist(adjective, close, quiet, smooth, soft) |
| buttoned up(expression, adjective, close, quiet, smooth) |
| clammed up(expression, adjective, close, quiet, smooth) |
| close(adjective, quiet, soft, restrained) |