patriarchy vs social structure

patriarchy and social structure both are nouns.

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

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

patriarchy: a form of social organization in which a male is the family head and title is traced through the male line
social structure: the people in a society considered as a system organized by a characteristic pattern of relationships

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

patriarchy (noun)	social structure (noun)
a form of social organization in which a male is the family head and title is traced through the male line	the people in a society considered as a system organized by a characteristic pattern of relationships