lack of sleep

noun 0.760

insomnia

noun 0.751

sleep deprivation

noun 0.706

sleepiness

noun 0.682

sleep disorder

noun 0.667

insomniac

noun 0.656

restfulness

noun 0.641

restlessness

noun 0.631

wakefulness

noun 0.630

sleep

noun 0.623

sleeping

noun 0.617

somnolence

noun 0.611

sleepy

noun 0.609

slumber

noun 0.602

sleep debt

noun 0.597

somnambulism

noun 0.594

listlessness

noun 0.591

lessness

noun 0.589

narcolepsy

noun 0.586

dead sleep

noun 0.583

sleep hygiene

noun 0.582

drowsiness

noun 0.581

deep sleep

noun 0.579

morning sleep

noun 0.577

slumbering

noun 0.576

sleeping sickness

noun 0.574

tiredness

noun 0.566

big sleep

noun 0.566

parasomnia

noun 0.558

weariness

noun 0.558

sleeping pill

noun 0.553

restiveness

noun 0.550

motionlessness

noun 0.549

speechlessness

noun 0.549

tirelessness

noun 0.548

sleep paralysis

noun 0.547

noiselessness

noun 0.544

lifelessness

noun 0.541

sleepwalker

noun 0.539

worklessness

noun 0.533

breathlessness

noun 0.532

lovelessness

noun 0.529

slothfulness

noun 0.527

sleep schedule

noun 0.527

slepton

noun 0.526

fatal familial insomnia

noun 0.526

sleeping tablet

noun 0.524

sleepyhead

noun 0.523

sleepwear

noun 0.522

snoring

noun 0.521

sleep apnea

noun 0.520

joblessness

noun 0.519

childlessness

noun 0.519

stillness

noun 0.518

idiopathic hypersomnia

noun 0.518

nervousness

noun 0.517

somnambulist

noun 0.517

narcoleptic

noun 0.515

sopor

noun 0.513

witlessness

noun 0.512

somnambulant

noun 0.511

shiftlessness

noun 0.510

lassitude

noun 0.510

sightlessness

noun 0.510

senselessness

noun 0.509

alertness

noun 0.508

watchfulness

noun 0.507

fitfulness

noun 0.507

worldlessness

noun 0.505

lostness

noun 0.504

all-nighter

noun 0.503

sleep of the just

noun 0.503

forgetfulness

noun 0.503

night blindness

noun 0.501

dormancy

noun 0.500

uneasiness

noun 0.500