accomplishment, achievement, acquirement, attainment, baby, success, triumph

blockbuster, hit, jackpot, megahit, miracle, smash, winnerconquest, gain, victory, winskilldeed, feat, performancearrival, completion, consummation, culmination, execution, fruition, fulfillment(or fulfilment), implementation, realization

a feather in one's cap

nonachievement

botch, cock-up(British), mess, muddle, shamblesbummer, bust, catastrophe, debacle(also débâcle), disaster, dud, failure, fiasco, fizzle, flop, washoutdisappointment, letdown, loss, setback