| vigilant(adjective, sensible, careful, wise, tight) |
| witty(adjective, smooth, smart, bright, sensible) |
| able(tough, smart, bright, skill, clever) |
| agile(adjective, smart, intelligent, clever) |
| alive(significant, expressive, meaningful, intelligence wisdom) |
| attentive(adjective, reasonable, sober, realistic, sane) |
| cagy |
| clear-sighted(adjective, smooth, sharp, sensible, sensitive) |
| dodgy |
| duplicitous |
| gifted(adjective, smart, bright, skill, original) |
| hardheaded(hard, sound, sharp, practical, realistic) |
| intellectual(adjective, smart, bright, deep, intelligent) |
| intriguing(adjective, mean, smooth, sensitive, intelligent) |
| knifelike |
| leery(sensible, careful, thoughtful, cunning, wise) |
| mindful |
| nimble(adjective, smart, bright, intelligent) |
| pointed(adjective, witty) |
| powerful(tough, effective, adept, effectual, well-organized) |