deep sleep

noun 0.569

theta rhythm

noun 0.563

ream

noun 0.548

sleep paralysis

noun 0.543

rem

noun 0.542

reticular formation

noun 0.541

rapid

noun 0.538

sleep spindle

noun 0.535

somnambulism

noun 0.524

alpha wave

noun 0.518

brainwave

noun 0.517

nystagmus

noun 0.517

random access memory

noun 0.510

dreaming

noun 0.508

sleep mode

noun 0.504

dry eye

noun 0.502