| nimble |
| no dummy(expression, smart, skillful, nimble-witted) |
| no slouch(expression, smart, skillful, nimble-witted) |
| on the beam(expression, idiom, smart, skillful, nimble-witted) |
| on the go(expression, idiom, lively, robust, sprightly) |
| on the move(expression, idiom, smart, skillful, nimble-witted) |
| penetrating(smart, intelligent, clever) |
| penetrative(smart, bright, intelligent, clever, skillful) |
| perspicacious(bright, sharp-witted, quick-thinking) |
| phenom(smart, skillful, nimble-witted) |
| proficient(smart, skillful, nimble-witted) |
| quick-thinking(bright, sharp-witted) |
| quick off the mark(expression, idiom, bright, sharp-witted, quick-thinking) |
| quick on trigger(expression, idiom, smart, skillful, nimble-witted) |
| really into(expression, smart, skillful, nimble-witted) |
| responsive |
| rip-roaring(riproaring, zappy, zingy) |
| riproaring(zappy, zingy) |
| robust(lively, sprightly, vivacious, lithe, agile) |
| rocking(lively, robust, sprightly, vivacious, lithe) |