| ideational |
| incisive(adjective, understanding, keen, sharp, alert) |
| insighted(adjective, understanding, keen, sharp, alert) |
| intellectual |
| intended(adjective, cool, crack, significant, intelligent) |
| intentional(adjective, cool, crack, significant, intelligent) |
| intuitive(adjective, understanding, keen, sensible, alert) |
| judicious(adjective, understanding, cool, smooth, keen) |
| keen(adjective, understanding, sensible, alert, sensitive) |
| noetic |
| observant(adjective, understanding, cool, keen, sharp) |
| penetrative(adjective, understanding, keen, alert, sensitive) |
| percipient(adjective, understanding, cool, keen, sharp) |
| perspicacious(adjective, understanding, smooth, keen, sharp) |
| plugged in(expression, adjective, smart, familiar, intelligent) |
| qualified(adjective, cool, significant, intelligent, brilliant) |
| quick(adjective, understanding, cool, keen, sharp) |
| quick-witted(adjective, cool, smart, significant, familiar) |
| responsive(adjective, understanding, keen, alert, sensitive) |
| savvy(adjective, understanding, keen, alert, sensitive) |