unification
//ˌjuːnɪfɪˈkeɪʃən//
Noun
unificationSingular
unificationsPlural
1
The process of being united or made into a whole.
The unification of the two companies took several years.
2
The act of combining separate parts, groups, or territories into a single entity.
The unification of the two countries brought peace to the region.