There are several synonyms for the term "unity of interest," which refer to the shared goals and objectives of a group or team. One common synonym is "collaboration," which emphasizes the importance of working together to achieve a common purpose. Another related term is "cooperation," which refers to the willingness to share resources, ideas, and efforts with others. Other synonyms for "unity of interest" include "solidarity," "harmony," and "synergy." Each of these terms highlights the importance of a shared vision and a sense of mutual support to achieve success in any collaborative endeavor.