brisk

active, airy, animate, animated, bouncing, energetic, frisky, gay, jaunty, jazzy, kinetic, lively, mettlesome, peppy, perky, pert, pizzazzy (or pizazzy), racy, snappy, spanking, sparky, spirited, sprightly, springy, vital, vivacious, zippy

blistering, breakneck, breathless, dizzy, fast, fleet, fleet-footed, flying, galloping, hasty, hot, lightning, nippy, quick, rapid, rapid-fire, rattling, snappy, speedy, splitting, swift, whirlwind, zippy

aboil, abubble, abuzz, alive, animated, astir, bustling, busy, buzzing, flourishing, happening, hopping, humming, kinetic, lively, rousing, stirring, thriving, vibrant