hierarchisation vs hierarchization

hierarchisation and hierarchization both are nouns.

Word	Noun	Adjective	Verb	Adverb
hierarchisation	Yes	No	No	No
hierarchization	Yes	No	No	No

As nouns, hierarchisation and hierarchization are synonyms defined as:

hierarchisation and hierarchization: The act or result of hierarchizing; the establishment of a hierarchy.

hierarchisation (noun)	hierarchization (noun)
The act or result of hierarchizing; the establishment of a hierarchy.	The act or result of hierarchizing; the establishment of a hierarchy.