General Synonyms:
* Relaxation
* Repose
* Break
* Pause
* Recess
* Intermission
* Sojourn
* Quiet
* Ease
* Tranquility
* Lethargy (implies a state of inactivity)
Synonyms related to sleep:
* Sleep
* Slumber
* Nap
* Snooze
Synonyms related to stopping work:
* Cease
* Stop
* Halt
* End
* Suspend
Synonyms related to physical support:
* Support
* Lean
* Lie
* Recline
* Sit
Synonyms related to remaining:
* Remain
* Stay
* Abide
Synonyms related to leaving:
* Retire
* Depart
* Go
The best synonym will depend on the specific situation and the meaning you want to convey.