nouns
a natural and periodic state of rest during which consciousness of the world is suspended
"he didn't get enough sleep last night"; "calm as a child in dreamless slumber"
a torpid state resembling deep sleep
a period of time spent sleeping
"he felt better after a little sleep"; "there wasn't time for a nap"
euphemisms for death (based on an analogy between lying in a bed and in a tomb)
"she was laid to rest beside her husband"; "they had to put their family pet to sleep"