| knowing(familiar, knowledgeable, skilled, qualified, informed) |
| knowing the ropes(expression, idiom, skilled, accomplished, talented) |
| knowing the score(expression, idiom, sophisticated, knowledgeable, competent) |
| knowledgeable(familiar, skilled, qualified, informed, experienced) |
| like a one-man band(expression, idiom, skilled, accomplished, talented) |
| like a pistol(expression, idiom, skilled, accomplished, talented) |
| longtimer(noun, person) |
| masterly(skilled, accomplished, talented) |
| mature(familiar, sophisticated, knowledgeable, skilled, competent) |
| matured(familiar, sophisticated, knowledgeable, skilled, competent) |
| mavin |
| monster(noun, adult) |
| old(familiar, sophisticated, knowledgeable, skilled, competent) |
| old guard(noun, expression, person, expert, pro) |
| old soldier(noun, expression, idiom, person, expert) |
| old war-horse(expression, authority, expert, specialist, artist) |
| oldster(noun, adult) |
| on the ball(expression, idiom, skilled, accomplished, talented) |
| person experienced in something(noun, person) |
| phenom(authority, expert, specialist, artist) |