social occasion vs social function

social occasion and social function both are nouns.

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

As nouns, social occasion and social function are synonyms defined as:

social occasion and social function: a formal or official social gathering or ceremony of people

Other synonyms of social occasion include affair, function, occasion, social affair, social gathering.

social occasion (noun)	social function (noun)
a formal or official social gathering or ceremony of people	a formal or official social gathering or ceremony of people