decimalization vs decimalisation

decimalization and decimalisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
decimalization	Yes	No	No	No
decimalisation	Yes	No	No	No

As nouns, decimalization and decimalisation are synonyms defined as:

decimalization and decimalisation: the act of changing to a decimal system

decimalization (noun)	decimalisation (noun)
the act of changing to a decimal system	the act of changing to a decimal system