Synonyms and related words :
a corps perdu, abrupt, abruptly, accident-prone, agile, bluff, bold, breakneck, breathless, careless, carelessly, daredevil, daring, dashing, desperate, desperately, devil-may-care, double-quick, eagle-winged, electrifying, expeditious, express, fast, fleet, flying, foolhardy, furious, furiously, galloping, hair-trigger, happen what may, harum-scarum, hastily, hasty, head over heels, headfirst, headforemost, heedlessly, heels over head, helter-skelter, holus-bolus, hotheaded, hotheadedly, hurried, hurriedly, hurry-scurry, hustling, impatient, impetuous, impetuously, impulsive, impulsively, light of heel, light-footed, like crazy, like mad, lively, mad, madly, mercurial, nerve-shattering, nimble, nimble-footed, overeager, overeagerly, overenthusiastic, overenthusiastically, overhasty, overzealous, overzealously, panting, plunging, precipitant, precipitantly, precipitate, precipitately, precipitous, precipitously, prompt, quick, quick as lightning, quick as thought, quickly, ramble-scramble, rapid, rash, rashly, reckless, recklessly, running, rushing, sharp, sheer, shocking, slam-bang, slap-bang, slapdash, snappy, spanking, speedy, startling, steep, sudden, suddenly, surprising, swift, unanticipated, unexpected, unforeseen, unlooked-for, unpredicted, vertical, wanton, wantonly, wild, wildly, winged