| hep to(expression, adjective, sensible, knowledgeable, witting) |
| hip to(expression, adjective, sensible, knowledgeable, aware) |
| hot(expert, skilled, capable, skillful, adroit) |
| hot tamale(expression, smart, skillful, nimble, artful) |
| hotshot(adjective, smart, expert, skilled, capable) |
| hunky-dory(cool, pleasant, fair, big, agreeable) |
| impeccable(right, perfect, exact, proper, true) |
| in on(expression, adjective, sensible, knowledgeable, witting) |
| in the swim(expression, idiom, cool, fair, agreeable) |
| in to(expression, adjective, smart, sympathetic, familiar) |
| informed(adjective, sensible, alert, familiar, wise) |
| judicious(adjective, sensible, knowledgeable, aware, informed) |
| just(right, perfect, exact, proper, true) |
| kept posted(expression, sympathetic, familiar, knowledgeable, skilled) |
| know-how(adjective, alert, familiar, wise, knowledgeable) |
| know stuff(expression, adjective, smart, skilled, capable) |
| know the score(expression, adjective, idiom, alert, familiar) |
| knowledgeable(adjective, sensible, alert, familiar, wise) |
| kosher(cool, pleasant, fair, big, agreeable) |
| large(cool, pleasant, fair, big, agreeable) |