agile (adj.)
- active
- acute
- adroit
- alacritous
- alert
- alive
- attentive
- awake
- breakneck
- bright
- brisk
- catty
- dashing
- deft
- dexterous
- dextrous
- double-quick
- expeditious
- express
- fast
- fleet
- flying
- graceful
- hasty
- headlong
- keen
- light
- light-footed
- limber
- lissome
- lithe
- lively
- mercurial
- nimble
- precipitate
- prompt
- quick
- rapid
- ready
- reckless
- resourceful
- running
- sharp
- sleepless
- smart
- snappy
- spanking
- speedy
- sprightly
- spry
- supple
- sure-footed
- swift
- tripping
- unblinking
- unsleeping
- volant
- wakeful
- wide-awake
- winged
- zippy
