social organisation vs British spelling

social organisation and British spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
social organisation	Yes	No	No	No
British spelling	Yes	No	No	No

social organisation (noun)	British spelling (noun)
the people in a society considered as a system organized by a characteristic pattern of relationships	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')