centralisation vs centralization

centralisation and centralization both are nouns.

Word	Noun	Adjective	Verb	Adverb
centralisation	Yes	No	No	No
centralization	Yes	No	No	No

As nouns, centralisation and centralization are synonyms defined as:

centralisation and centralization: the act of consolidating power under a central control

As nouns, centralisation and centralization are synonyms defined as:

centralisation (noun)	centralization (noun)
the act of consolidating power under a central control	the act of consolidating power under a central control
gathering to a center	gathering to a center