self-organisation vs British spelling

self-organisation and British spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
self-organisation	Yes	No	No	No
British spelling	Yes	No	No	No

self-organisation (noun)	British spelling (noun)
organizing yourself (especially organizing your own labor union)	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')