Expanded surface refers to the enlarged area of a surface or object, which may result from modifications, additions, or elongations. There are various synonyms that can be used to describe an expanded surface, depending on the context and the nature of the expansion. Some of these terms include extended surface, enlarged surface, augmented surface, amplified surface, increased surface, expanded area, magnified surface, inflated surface, widened surface, and broadened surface, among others. These synonyms can be useful in expressing different nuances of the expansion, such as the degree, direction, or purpose of the enlargement. Therefore, choosing the appropriate synonym can help to convey a more precise and descriptive meaning of the expanded surface.