modernisation vs modernization

modernisation and modernization both are nouns.

Word	Noun	Adjective	Verb	Adverb
modernisation	Yes	No	No	No
modernization	Yes	No	No	No

As nouns, modernisation and modernization are synonyms defined as:

modernisation and modernization: making modern in appearance or behavior

modernisation (noun)	modernization (noun)
making modern in appearance or behavior	making modern in appearance or behavior
	a modernized version (as of a play)