Another word for quiet
hushed, muffled, noiseless, still, stilled, mute, muted, low, soft, inaudible, soundless, dumb, quieted, speechless, unspeaking, mum, quiescent, taciturn, reserved, reticent, unuttered, unexpressed, close-mouthed, close, tight-lipped, uncommunicative, secretive.
To make calm
calm, cool, relax, compose, tranquilize, soothe, comfort, satisfy, pacify, mollify, placate, assuage, console, subdue, reconcile, gratify, calm down, soften, moderate, smooth, ameliorate, allay, quell, becalm, lull, appease, restrain, palliate, sober, slacken; see also comfort, ease 1, 2.
To make silent
hush, still, deaden, silence, soften, mute, tone down, lower the sound level, muffle, stifle, smother, gag, muzzle, stop, check, restrain, suppress, break in, cut short, preclude, confute, repress, refute, confound, answer, quell, insulate, dampen, shush, shut up*, stop the mouth*, floor*, put the lid on*, button up*, choke off*, put the kibosh on*, put the stopper on*, squelch*.
Another word for quietadjective
Marked by, done with, or making no sound or noise:hushed, noiseless, silent, soundless, still, stilly. (Archaic) hush. See sounds
Not irritating, strident, or loud:hushed, low, low-key, low-keyed, small, soft, subdued, whispery. See sounds
Motionless and undisturbed:calm, halcyon, peaceful, placid, serene, still, stilly, tranquil, untroubled. See calm
Not showy or obtrusive:inobtrusive, restrained, subdued, tasteful, unobtrusive. See plain
The absence of sound or noise:hush, noiselessness, quietness, silence, soundlessness, still, stillness. See sounds
An absence of motion or disturbance:calm, calmness, hush, lull, peace, peacefulness, placidity, placidness, quietness, serenity, stillness, tranquillity, untroubledness. See calm