CAML, or Collaborative Application Markup Language, is an XML-based language used to query data in SharePoint. While CAML is the standard language for querying data in SharePoint, there are several synonyms that can be used to refer to it. Some of these synonyms include Collaborative Application Markup, Schema, and SharePoint Query Language. Other synonyms include Microsoft SharePoint Expression, SharePoint Object Model Query Language, and SharePoint Query Object Model Language. Despite the various terms used to describe CAML, they all refer to the same language used to query data in SharePoint environments. As such, it's important to have a clear understanding of CAML and its synonyms when working with SharePoint.