n. 25B6; noun
150 people attended the party : (SOCIAL) GATHERING, (social) function, get-together, celebration, reunion, festivity, jamboree, reception, at-home, soirée, social; dance, ball, ceilidh, frolic, carousal, carouse; N. Amer. fête, hoedown, shower, bake, cookout, levee; Austral./NZ corroboree; informal bash, shindig, rave, disco, do, shebang, bop, hop; Brit. informal rave-up, knees-up, beanfeast, beano, bunfight; N. Amer. informal blast, wingding, kegger; Austral./NZ informal shivoo, rage, ding, jollo, rort.
a party of British tourists : GROUP, company, body, gang, band, crowd, pack, contingent; informal bunch, crew, load.
the left-wing parties : FACTION, political party, group, grouping, cabal, junta, bloc, camp, caucus.
don't mention a certain party : PERSON, individual, somebody, someone.
25B6; verb (informal) let's party! : CELEBRATE, have fun, enjoy oneself, have a party, have a good/wild time, go on a spree, rave it up, carouse, make merry; informal go out on the town, paint the town red, whoop it up, let one's hair down, make whoopee, live it up, have a ball.
25A0; be a party to GET INVOLVED IN/WITH, be associated with, be a participant in.