District, a common word used to describe a geographic region or administrative area, can be replaced by various synonyms. One alternative is "zone," which suggests a specific area with a similar purpose or function. "Region" is another synonym that can describe a larger area, often with more distinct boundaries. "Sector" implies a specific segment or industry within a district, while "territory" emphasizes ownership or control over a specific area. "Area" is a commonly used and more general term that can be used in place of district. Ultimately, the choice of synonym depends on the context and purpose of the description.