allay appease assibilate assibilation awful silence black out buzz calm calm down censor choke choke off compose conceal cool cover up cradle dead dead of night deathlike silence dulcify dumbfound ease effervesce effervescence effervescing even out fall silent fizz fizzle fizzling frication frictional rustling gag gentle golden silence hide hiss hissing hugger-mugger hugger-muggery hush of night hush up hush-hush hushing inaudibility keep quiet kill lisp lucid stillness lull mollify muffle mum mute muzzle noiseless noiselessness pacify peace pipe down placate pour balm into put to silence quash quell quiesce quiescence quiet quiet down quieten quietness quietude repress rest rhonchus rock rock to sleep secretiveness secretness shush shushing shut down on shut up sibilance sibilate sibilation siffle sigmatism silence silent silentness siss sissing sit on sizz sizzle sizzling smooth smooth down smooth over smoothen smother sneeze sneezing sniff sniffle snore snort snuff snuffle soft-pedal soften solemn silence soothe soundless soundlessness spit splutter sputter squash squelch squish stabilize steady sternutation stertor stifle still stillness stilly strike dumb subdue suppress swish tacitness taciturnity throttle tomblike silence tranquilize tranquillity wheeze whish whisht whisper whist whistle whistling white noise whiz whoosh zip