compartmentalisation vs British spelling

compartmentalisation and British spelling both are nouns.

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

compartmentalisation (noun)	British spelling (noun)
the act of distributing things into classes or categories of the same type	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')
a mild state of dissociation