The phrase "extend to" is commonly used in different contexts, and it means to reach out or spread over a particular area or group. Some synonyms for "extend to" include encompass, cover, include, involve, and span. Encompass suggests a comprehensive scope, while cover means to go over or wrap around. Include means to contain or have as part of, while involve implies active participation or connection. Span suggests a distance or duration while extending over an area. Understanding the synonyms for extend to can help in improving one's writing ability and communication skills by offering variety and precision in expression.