Castiles is a term used to refer to a type of soap that originated in Castile, Spain. Synonyms for castiles can vary depending on the specific characteristics of the soap. For example, all-natural castile soap can be described as gentle, moisturizing, and organic. Some alternative terms for castiles include vegetable-based soap, olive oil soap, or pure soap. These terms are often used interchangeably with castiles as a way to indicate that the soap is free of chemicals, fragrances, and other harsh ingredients. Other descriptors that may be used to describe castiles include mild, hypoallergenic, sustainable, and eco-friendly. Overall, synonyms for castiles tend to emphasize the soap's simplicity and effectiveness as a natural, gentle cleanser.