demythologisation vs demythologization

demythologisation and demythologization both are nouns.

Word	Noun	Adjective	Verb	Adverb
demythologisation	Yes	No	No	No
demythologization	Yes	No	No	No

As nouns, demythologisation and demythologization are synonyms defined as:

demythologisation and demythologization: the restatement of a message (as a religious one) in rational terms

demythologisation (noun)	demythologization (noun)
the restatement of a message (as a religious one) in rational terms	the restatement of a message (as a religious one) in rational terms