Synonyms and related words :
accomplished, at concert pitch, blase, career, coached, conversant, cosmopolitan, cosmopolite, experienced, finished, initiate, initiated, knowing, mature, matured, not born yesterday, old, old-time, practical, prepared, primed, professional, ripe, ripened, sagacious, seasoned, skilled, sophisticated, technical, trained, tried, tried and true, versed, vet, veteran, world-wise, worldly, worldly-wise