A person or force that brings different groups or parties together into a coalition.
From coalize + -er (agent noun). The -er suffix identifies someone who performs an action. This is a relatively recent word, likely emerging in late 20th-century political science.
Coalizers are rare political talents—they have the credibility with multiple groups to bring former enemies to the same table, making them invaluable but also often distrusted by their own sides!
Complete word intelligence in one call. Free tier — 50 lookups/day.