The words "bath" and "bathe" are related but have different uses, which can be confusing. Generally, "bath" is a noun, referring to a container filled with water for washing, or the act of washing itself, like taking a bath. On the other hand, "bathe" is a verb that means to wash or immerse something or someone in water, like bathing a baby or bathing in the sun. So, if you're talking about the act of washing, you'd use "bathe", but if you're referring to the container or the event, you'd use "bath".