28 Moby Thesaurus words for "costume party": Kaffeeklatsch, ball, blowout, cocktail party, coffee klatch, dinner, dinner party, donation party, entertainment, festivity, garden party, hen party, house party, house-raising, housewarming, lawn party, mask, masque, masquerade, masquerade party, party, shindig, shindy, shower, smoker, stag, stag party, surprise party