| percipient(adjective, sound, sensible, sympathetic, rational) |
| perspicacious(sound, reasonable, smart, bright, sensible) |
| philosophic(sound, reasonable, sensible, reasoning, intellectual) |
| plausible(adjective, sound, sensible, rational, intelligent) |
| playing with full deck(expression, idiom, sensible, rational, healthy) |
| practical(adjective, calm, sound, reasonable, sensible) |
| profound(smart, bright, brainy) |
| quick(adjective, smart, bright, skillful, brainy) |
| quick-witted(smart, bright, skillful, brainy, sharp-witted) |
| quick on the draw(expression, idiom, smart, bright, active) |
| quick on the trigger(expression, idiom, smart, bright, skillful) |
| quick on the uptake(expression, idiom, smart, bright, active) |
| ratiocinative(adjective, sound, reasonable, sensible, rational) |
| ready(smart, bright, brainy, sharp-witted, quick-thinking) |
| realistic(adjective, sound, reasonable, sensible, rational) |
| reasoned(adjective, sound, reasonable, sensible, rational) |
| reasoning(adjective, sound, reasonable, sensible, rational) |
| receptive(bright, active, wise, sharp-witted, quick-thinking) |
| reflective(adjective, sound, reasonable, sensible, rational) |
| respectable(adjective, good, sound, right, reasonable) |