decentralization vs decentalisation

decentralization and decentalisation both are nouns.

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

As nouns, decentralization and decentalisation are synonyms defined as:

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

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