Synonyms and related words :
amain, apace, astir, at it, at once, at work, busy, by forced marches, cursorily, employed, en route, engaged, expeditiously, feverishly, full of business, furiously, hand over fist, hard at it, hard at work, hastily, helter-skelter, hotfoot, hurriedly, hurry-scurry, immediately, in harness, in motion, in passing, in transit, instantly, occupied, on duty, on the bum, on the gad, on the go, on the hop, on the job, on the jump, on the move, on the road, on the tramp, on the wing, pell-mell, promptly, quickly, slapdash, speedily, superficially, swiftly, tied up, under sail, under way, with a rush, with all haste, with dispatch, with haste, working