decentalisation vs decentralization

decentalisation and decentralization both are nouns.

Word	Noun	Adjective	Verb	Adverb
decentalisation	Yes	No	No	No
decentralization	Yes	No	No	No

As nouns, decentalisation and decentralization are synonyms defined as:

decentalisation and decentralization: the social process in which population and industry moves from urban centers to outlying districts

decentalisation (noun)	decentralization (noun)
the social process in which population and industry moves from urban centers to outlying districts	the spread of power away from the center to local branches or governments
	the social process in which population and industry moves from urban centers to outlying districts