| cool(adjective, reasonable, informal, significant, familiar) |
| enlightened(adjective, smart, experience, know, capable) |
| familiar with(verb, expression, adjective, phrasal verb, knowledge) |
| hip(adjective, informal, familiar, knowledgeable, experienced) |
| percipient(adjective, understanding, cool, keen, sensible) |
| qualified(adjective, cool, smart, experience, significant) |
| versatile(adjective, flexible, adjustable) |
| well-informed(adjective, cool, significant, familiar, intelligent) |
| well up in(expression, adjective, idiom, smart, experience) |
| active |
| adept(expert, capable, talented) |
| advised(familiar, aware, informed) |
| alert(adjective, understanding, keen, sensible, certain) |
| apt(skill, expert, capable, talented) |
| at home with(expression, adjective, idiom, familiar, knowledgeable) |
| attentive(adjective, understanding, reasonable, keen, sensible) |
| awake(adjective, understanding, cool, keen, sensible) |
| connoisseur |
| discerning(adjective, understanding, cool, reasonable, keen) |
| erudite(adjective, familiar, knowledgeable, aware, informed) |