A bath in which water is showered upon the person from above.(noun)
An apparatus for pouring a shower of water upon the body.(noun)
The Century Dictionary (Public Domain)
Use "shower-bath" in a sentence
"I washed my pack in the shower-bath, then left it open to breathe next to the window."
"Go into the shower-bath with a small quantity of water at a temperature low enough to give you a slight sensation of cold, 75 or 80 degrees."
"After a much more pleasant shower-bath, this time shared, and yet another change of clothing, Darian stumbled over Keisha's bundle in the middle of the floor of the outer room."