Westernisation vs Westernization

Westernisation and Westernization both are nouns.

Word	Noun	Adjective	Verb	Adverb
Westernisation	Yes	No	No	No
Westernization	Yes	No	No	No

As nouns, Westernisation and Westernization are synonyms defined as:

Westernisation and Westernization: assimilation of Western culture; the social process of becoming familiar with or converting to the customs and practices of Western civilization

Westernisation (noun)	Westernization (noun)
assimilation of Western culture; the social process of becoming familiar with or converting to the customs and practices of Western civilization	assimilation of Western culture; the social process of becoming familiar with or converting to the customs and practices of Western civilization