amalgamation

US /əˌmæl.ɡəˈmeɪ.ʃən/
UK /əˌmæl.ɡəˈmeɪ.ʃən/
1.

sự hợp nhất

the process in which separate organizations unite to form a larger organization or group, or an organization or group formed in this way:

:
The association was formed by the amalgamation of several regional environmental organizations.