social organization vs social organisation

social organization and social organisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
social organization	Yes	No	No	No
social organisation	Yes	No	No	No

As nouns, social organization and social organisation are synonyms defined as:

social organization and social organisation: the people in a society considered as a system organized by a characteristic pattern of relationships

Other synonyms of social organization include social structure, social system, structure.

social organization (noun)	social organisation (noun)
the people in a society considered as a system organized by a characteristic pattern of relationships	the people in a society considered as a system organized by a characteristic pattern of relationships