itemisation vs British spelling

itemisation and British spelling both are nouns.

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

itemisation (noun)	British spelling (noun)
the act of making a list of items	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')