coma
pass out how about 'slumber'? im not sure if it refers to a deep kind of sleep, but it has 7 letters and it is sleep :)
Steep,Seep Sleep, sheep,
odd
unnatural
ghostly means eerie and/or unnatural
deep sleep
Natural is the opposite of unnatural.
A four letter word for not shallow is deep.
Parasomnia is a category of sleep disorders. This category involves unnatural and abnormal movements, behaviors, perceptions, dreams, and emotions that occur while falling asleep, during sleep, or being aroused from sleep.
The way to spell the word is unnatural.
A word beginning with R for sleep is rest.