| proficient(knowledgeable, skilled, qualified, experienced, seasoned) |
| qualified(familiar, sophisticated, knowledgeable, skilled, competent) |
| refined(adjective, smooth, familiar, knowledgeable, practical) |
| right stuff(expression, familiar, sophisticated, knowledgeable, competent) |
| rounded(familiar, sophisticated, knowledgeable, skilled, competent) |
| senescent |
| sharp(adjective, smooth, refined, practical, mature) |
| skeptical(adjective, refined, practical, mature, cultured) |
| skilled(familiar, knowledgeable, qualified, informed, experienced) |
| skillful(familiar, sophisticated, knowledgeable, skilled, competent) |
| smooth(refined, practical, cultured, urbane, erudite) |
| sophisticated(familiar, knowledgeable, skilled, qualified, experienced) |
| sport(familiar, sophisticated, knowledgeable, skilled, competent) |
| stagy(adjective, refined, practical, mature, cultured) |
| steady(skilled, experienced, seasoned) |
| streetwise(adjective, smooth, refined, practical, mature) |
| studied(adjective, smooth, refined, practical, mature) |
| suave(adjective, refined, practical, mature, cultured) |
| svelte(adjective, refined, practical, mature, cultured) |
| switched on(expression, refined, practical, mature, cultured) |