| knowing(smart, bright, intelligent, shrewd, clever) |
| perceptive(adjective, smart, bright, intelligent, clever) |
| perspicacious(adjective, smart, bright, shrewd, clever) |
| pointed |
| quick-thinking(bright, sharp-witted) |
| scintillating |
| sharp-witted(smart, bright, intelligent, clever, quick-thinking) |
| slick(smart, bright, intelligent, shrewd, clever) |
| sparkling |
| wise(smart, bright, active, intelligent, clever) |
| able(smart, bright, shrewd, clever, sharp-witted) |
| adept(smart, bright, skillful, sharp-witted, quick-thinking) |
| agile(smart, bright, intelligent, clever, slick) |
| all there(expression, smart, bright, active, wise) |
| biting |
| cagey(smart, shrewd, clever, subtle, artful) |
| capable(bright, active, wise, sharp-witted, quick-thinking) |
| careful(smart, shrewd, clever, subtle, artful) |
| cautious(smart, shrewd, clever, subtle, artful) |
| circumspect(smart, shrewd, clever, subtle, artful) |