ceremony vs social function

ceremony and social function both are nouns.

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

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

ceremony: a formal event performed on a special occasion
social function: a formal or official social gathering or ceremony of people

Other hypernyms of ceremony include affair, function, occasion, social affair, social gathering, social occasion.

ceremony (noun)	social function (noun)
the proper or conventional behavior on some solemn occasion	a formal or official social gathering or ceremony of people
any activity that is performed in an especially solemn elaborate or formal way
a formal event performed on a special occasion