Lathering is a common word used to describe the formation of foam or bubbles when a soap or shampoo is applied to the skin or hair. However, there are other synonyms that could be used in its place, including bubbling, foaming, soaping, frothing, bubbling up, making a rich lather, or working up a good lather. These synonyms can be used interchangeably depending on what type of product is being used or the desired effect. Regardless of the word used, the process of lathering is an essential part of cleansing and providing a rich texture to the soap or shampoo.