summarisation vs British spelling

summarisation and British spelling both are nouns.

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

summarisation (noun)	British spelling (noun)
the act of preparing a summary (or an instance thereof); stating briefly and succinctly	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')