greg-, -gregate, -gregation (Latin: assemble, gather, gather together).aggregate: 
aggregation: 
congregate: 
congregating: 
congregation: 
Congregationalist: 
congregator: 
desegregate: 
desegregation: 
desegregationist: 
egregious: 
gregarious: 
segregate: 
segregation: 
segregationist: 
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