social function vs assemblage

social function and assemblage both are nouns.

Word	Noun	Adjective	Verb	Adverb
social function	Yes	No	No	No
assemblage	Yes	No	No	No

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

social function: a formal or official social gathering or ceremony of people
assemblage: a group of persons together in one place

Other hypernyms of social function include social event, gathering.

social function (noun)	assemblage (noun)
a formal or official social gathering or ceremony of people	the social act of assembling
	a system of components assembled together for a particular purpose
	a group of persons together in one place
	several things grouped together or considered as a whole