federalisation vs British spelling

federalisation and British spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
federalisation	Yes	No	No	No
British spelling	Yes	No	No	No

federalisation (noun)	British spelling (noun)
the act of being put under federal control	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')
the state of being under federal control