expeditious (adj.)

• agile
• alacritous
• alert
• apt
• breakneck
• brisk
• cursory
• dashing
• decisive
• diligent
• double-quick
• effective
• effectual
• efficacious
• efficient
• express
• fast
• feverish
• fleet
• flying
• furious
• hasty
• headlong
• hurried
• immediate
• instant
• instantaneous
• last-minute
• light-footed
• lively
• mercurial
• nimble
• passing
• precipitate
• prompt
• punctual
• quick
• rapid
• ready
• reckless
• running
• sharp
• slapdash
• smart
• snappy
• spanking
• speedy
• spry
• summary
• superficial
• swift
• urgent
• winged