This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. The state of being quiescent; dormancy.

n. Being at rest, quiet, still, inactive or motionless.

n. The action of bringing something to rest or making it quiescent; the action of coming to rest or to a quiescent state.

n. When a cell is in a term of no growth and no division.

n. The state or quality of being quiescent.

n. The state or quality of being quiescent or inactive; rest; repose; inactivity; the state of a thing without motion or agitation: as, the quiescence of a volcano.

n. In philology, silence; the condition of not being heard in pronunciation: as, the quiescence of a letter.

n. In biology, quietude or inactivity; a state of animal life approaching torpidity, but in which the animal is capable of some motion, and may receive food: it is observed among insects during either hibernation or pupation, and in many other animals both higher and lower in the scale than these.

n. a state of quiet (but possibly temporary) inaction

n. quiet and inactive restfulness

"Seeing society's behavior, which ranges from sheer panic to quiescence, is downright creepy."

quiescency   

inaction    stagnation    quietude    torpor    inertness    lethargy    derangement    seclusion    tranquility    immobility