party vs social affair

party and social affair both are nouns.

Word	Noun	Adjective	Verb	Adverb
party	Yes	No	Yes	No
social affair	Yes	No	No	No

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

party: an occasion on which people can assemble for social interaction and entertainment
social affair: a formal or official social gathering or ceremony of people

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

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

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

party (noun)	social affair (noun)
an occasion on which people can assemble for social interaction and entertainment	a formal or official social gathering or ceremony of people
a gathering of people for pleasure
an organization to gain political power
a band of people associated temporarily in some activity
a person involved in legal proceedings

party (verb)	social affair (verb)
have or participate in a party