bustling

active, assiduous, busy, diligent, employed, engaged, hopping, industrious, laborious, occupied, sedulous, tied-up, working

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

abounding, brimming, bristling, bulging, bursting, buzzing, crawling, humming, overflowing, pullulating, swarming, teeming

barreling (or barrelling), belting, blasting, blazing, blowing, bolting, bombing [slang], bowling, breezing, bundling, buzzing, cannonballing, careening, careering, chasing, coursing, cracking (on), dashing, driving, flying, haring, hastening, highballing, hotfooting (it), humping, hurling, hurrying, hurtling, hustling, hying (or hieing), jetting, jumping, motoring, nipping, pelting, racing, ramming, ripping, rocketing, running, rushing, rustling, scooting, scurrying, scuttling, shooting, speeding, stepping, tearing, traveling (or travelling), trotting, whirling, whisking, zipping, zooming