social organization vs social system

social organization and social system both are nouns.

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

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

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

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

social organization (noun)	social system (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