Nouns

(n)matter, affair, thinga vaguely specified concern“several matters to attend to”, “it is none of your affair”, “things are going well”
(n)affair, affaire, intimacy, liaison, involvement, amoura usually secretive or illicit sexual relationship
(n)affair, occasion, social occasion, function, social function, social gathering, social affaira formal or official social gathering or ceremony of people“the party was quite an affair”, “an occasion arranged to honor the president”, “a seemingly endless round of social functions”