The crossword solutions for the term CAKE BATHDAY are SOAP, which is a four letter word. SOAP is a cleansing agent made from the salts of vegetable or animal fats. It is used to cleanse the skin and remove dirt and oils. SOAP is also used in many bath products such as bubble baths and bath bombs. On a birthday, cake is often served as a celebratory treat. Therefore, the term CAKE BATHDAY can be interpreted as a celebration involving SOAP and cake.