association vs social activity

association and social activity both are nouns.

Word	Noun	Adjective	Verb	Adverb
association	Yes	No	No	No
social activity	Yes	No	No	No

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

association (noun)	social activity (noun)
the act of consorting with or joining with others	activity considered appropriate on social occasions
the process of bringing ideas or events together in memory or imagination
a formal organization of people or groups of people
(ecology) a group of organisms (plants and animals) that live together in a certain geographical region and constitute a community with a few dominant species
(chemistry) any process of combination (especially in solution) that depends on relatively weak chemical bonding
a relation resulting from interaction or dependence
a social or business relationship
the state of being connected together as in memory or imagination