coma
A word beginning with R for sleep is rest.
sopor
Steep,Seep Sleep, sheep,
One option is pensive.
As. The shortest word beginning with the letter a is "a"
A word for cow shed beginning with the letter "b" is barn. A barn is usually complete with hay or straw on which the cows sleep and may also feed.
Slumber
* sheep * sheet * sheen * sleep * steep * steel * steed * sweep * sweet * strew * strep * skied * spied
deep sleep
The word is :versevaultvaluevalvevideovenueviperviralvitalvotervaporvocal
A four letter word beginning with C and ending with X is crux.