ataraxia
ataraxy
awful silence
calm
calmness
composure
contemplation
dead
dead of night
deathlike silence
golden silence
hush
hush of night
imperturbability
inactivity
inaudibility
lucid stillness
lull
marmoreal repose
motionlessness
mum
nirvana
noiselessness
peace
peacefulness
placidity
placidness
quiescence
quiescency
quiet
quietism
quietness
quietude
repose
rest
restfulness
satori
serenity
silence
silentness
silken repose
sleep
slumber
solemn silence
soundlessness
still
tacitness
blackness
brightness
chill
clarity
coolness
emptiness
haze
loneliness
solitude
splendor
sweetness
twilight
warmth
whiteness
illness