lack of sleep

noun 0.839

sleep debt

noun 0.758

sleeplessness

noun 0.706

sleep disorder

noun 0.699

sleepiness

noun 0.661

insomnia

noun 0.655

deprivation

noun 0.641

deep sleep

noun 0.635

driver fatigue

noun 0.633

sleep apnea

noun 0.624

sleeping

noun 0.619

sleep hygiene

noun 0.619

sleepy

noun 0.616

sleep

noun 0.615

narcolepsy

noun 0.600

dead sleep

noun 0.597

somnolence

noun 0.596

tiredness

noun 0.596

drowsiness

noun 0.589

sleep paralysis

noun 0.587

morning sleep

noun 0.585

dehydration

noun 0.581

big sleep

noun 0.578

fatigue

noun 0.573

deprival

noun 0.567

depravation

noun 0.564

sleep mode

noun 0.558

insomniac

noun 0.554

depression

noun 0.549

sleep schedule

noun 0.548

exhaustion

noun 0.548

sleepyhead

noun 0.545

depletion

noun 0.543

slumber

noun 0.541

sleeping sickness

noun 0.538

apnea

noun 0.535

privation

noun 0.532

snoring

noun 0.532

sleeping pill

noun 0.531

attention deficit disorder

noun 0.530

parasomnia

noun 0.529

deficiency

noun 0.525

somnambulism

noun 0.524

winter depression

noun 0.524

jet lag

noun 0.523

lessness

noun 0.522

starvation

noun 0.519

overwork

noun 0.518

night blindness

noun 0.518

oxygen deficit

noun 0.517

depressive disorder

noun 0.517

weariness

noun 0.516

wakefulness

noun 0.516

power nap

noun 0.516

oxygen depletion

noun 0.514

deafness

noun 0.513

undernourishment

noun 0.512

dozing

noun 0.512

malnourishment

noun 0.511

all-nighter

noun 0.508

dormancy

noun 0.508

narcoleptic

noun 0.507

deficit

noun 0.505

drowse

noun 0.505

malnutrition

noun 0.504

slumbering

noun 0.503

hypoarousal

noun 0.503

snooze

noun 0.501

suffocation

noun 0.501