enthronisation vs enthronization

enthronisation and enthronization both are nouns.

Word	Noun	Adjective	Verb	Adverb
enthronisation	Yes	No	No	No
enthronization	Yes	No	No	No

As nouns, enthronisation and enthronization are synonyms defined as:

enthronisation and enthronization: the ceremony of installing a new monarch

Other synonyms of enthronisation include coronation, enthronement, investiture.

enthronisation (noun)	enthronization (noun)
the ceremony of installing a new monarch	the ceremony of installing a new monarch