THESAURUS
keep quiet
abide, be mute, be silent, be still, coast, forswear speech, freeze, keep mum, keep silent, keep still, lie still, make no sign, mark time, not breathe, not stir, play dumb, remain, remain motionless, repose, rest, say nothing, shut up, stand, stand fast, stand firm, stand mute, stand still, stay, stay put, stick, stick fast, tarry, tread water
ROGET THESAURUS
keep quiet
Inaction
VB
not do, not act, not attempt, be inactive, abstain from doing, do nothing, hold, spare, not stir, not move, not lift a finger, not lift a foot, not lift a peg, fold one's arms, fold one's hands, leave alone, let alone, let be, let pass, let things take their course, let it have its way, let well alone, let well enough alone, quieta non movere, stare super antiquas vias, rest and be thankful, live and let live, lie rest upon one's oars, laisser aller, faire, stand aloof, refrain, keep oneself from doing, remit one's efforts, relax one's efforts, desist, stop, pause, wait, lie in wait, bide one's time, take time, tide it over, cool one's heels, kick one's heels, while away the time, while away tedious hours, pass the time, fill up the time, beguile the time, talk against time, let the grass grow under one's feet, waste time, lie by, lie on the shelf, lie in ordinary, lie idle, lie to, lie fallow,
keep quiet, slug, have nothing to do, whistle for want of thought, undo, do away with, take down, take to pieces, destroy.
Quiescence
VB
be quiescent, stand still, lie still,
keep quiet, repose, hold the breath, remain, stay, stand, lie to, ride at anchor, remain in situ, tarry, mark time, bring to, heave to, lay to, pull up, draw up, hold, halt, stop, stop short, rest, pause, anchor, cast to an anchor, come to an anchor, rest on one's oars, repose on one's laurels, take breath, stop, stagnate, quieta non movere, let alone, abide, rest and be thankful, keep within doors, stay at home, go to bed, dwell, settle, alight, stick, stick fast, stand like a post, not stir a peg, not stir a step, be at a stand, quell, becalm, hush, stay, lull to sleep, lay an embargo on.