Here in Brazil it's very common to have several showers a day. I, for example, take two. The first is when I wake up, before I go to work, and the second is when I get home from work. I wake up at 6.30am and get home at 8pm.
In this thread: People who do not grasp the intention of the question and focus on the semantics of a foreign lenguage being translated as best as possible for OP.
For this context alone: BATH = SHOWER
For all other times, yes they do mean different things.