A block of soap can also be referred to as a bar of soap. Other synonyms for a block of soap are cake of soap, chunk of soap, loaf of soap, slab of soap, and tablet of soap. These terms are often used interchangeably to describe a solid piece of soap that is typically rectangular in shape. The size, texture, and fragrance of a block of soap can vary depending on the brand and type of soap. Some common types of soap include glycerin soap, castile soap, and exfoliating soap. Whatever type of soap you choose, a block of soap is a convenient and easy way to keep your skin clean and healthy.