Accretion Meaning: Gathering

Synonyms: Accumulation, collecting, gathering, etc.
Antonyms: Cumulation, etc.

Example: 
1) The accretion of traffic accidents and drink and drive led to the opening of the downtown mall.
2) The accretion of terror over years left many people dead and wounded.
3) There was an accretion of ice on the car’s windshield.
4) Mountains are formed due to the slow accretion of mud and rocks overages.