separatism vs social structure

separatism and social structure both are nouns.

Word	Noun	Adjective	Verb	Adverb
separatism	Yes	No	No	No
social structure	Yes	No	No	No

As nouns, social structure is a hypernym of separatism; that is, social structure is a word with a broader meaning than separatism:

separatism: a social system that provides separate facilities for minority groups
social structure: the people in a society considered as a system organized by a characteristic pattern of relationships

Other hypernyms of separatism include social organisation, social organization, social system, structure.

separatism (noun)	social structure (noun)
advocacy of a policy of strict separation of church and state	the people in a society considered as a system organized by a characteristic pattern of relationships
a disposition toward schism and secession from a larger group; the principles and practices of separatists
a social system that provides separate facilities for minority groups