The acronym RSIS stands for the S. Rajaratnam School of International Studies, a leading think tank in Asia-Pacific. Synonyms for RSIS include research institution, academic center, strategic studies institute, and policy research organization. RSIS is known for its rigorous research, analysis, and insights on contemporary international and regional issues, as well as its expertise in security studies, defense policy, and strategic affairs. Other synonyms for RSIS could be geopolitical research center, international affairs think tank, or Asia-Pacific policy hub. Regardless of the wording, RSIS remains a go-to source for policymakers, scholars, and professionals seeking to better understand the complexities of global and regional security issues.