gathering vs trio

Other hyponyms of gathering include affair, function, occasion, social affair, social function, social gathering, social occasion, carload, contingent, floor, pair, room, threesome, triad, trinity, turnout, foursome, quartet, quartette, fivesome, quintet, quintette, sextet, sextette, sixsome, septet, septette, sevensome, eightsome, octet, octette, assembly, crowd, concourse, multitude, throng, company, audience, community, municipality, cast, cast of characters, dramatis personae, class, course, form, grade, class, year, bunch, crew, crowd, gang, covey, quorum, commune, convocation, bevy, cortege, entourage, retinue, suite, camp, muster, rap group, rave-up, table.