dozy, dreamy, drowzy, lethargic, tired
:)
I think lethargic is usually used to mean a lack of energy, as opposed to needing to sleep. You can wake up lethargic. You shouldn't be trying to go to sleep when you feel lethargic.
sleep
A word beginning with R for sleep is rest.
somnambulism
sleep place
Another phrase for time to sleep is bedtime. Night Night, Sleepytime, Dreamtime are all different ways to say Time To Sleep.
Awaken? cmf3225
Slumber is another word for sleep.
A berth.
Slumber is another word for sleep.
Nap
I think is 'bed' obvious
relax sleep calm down Repose.