Synonyms to headfirst

abruptly, a corps perdu, bang, bearishly, bluffly, bluntly, boorishly, brashly, brusquely, cavalierly, churlishly, crustily, curtly, dash, forthwith, gruffly, harshly, hastily, head over heels, headforemost, headlong, heels over head, impetuously, impulsively, like a flash, like a thunderbolt, nastily, of a sudden, on short notice, plop, plump, plunk, pop, precipitantly, precipitately, precipitously, rashly, sharp, sharply, short, shortly, slap, slap-bang, smack, snippily, startlingly, sudden, suddenly, surprisingly, unawares, unexpectedly, without notice, without warning, furiously, all to pieces, amain, angrily, apace, at once, by forced marches, carelessly, cursorily, deliriously, demonically, desperately, distractedly, expeditiously, fanatically, feverishly, fiercely, frantically, frenetically, frenziedly, hand over fist, happen what may, heatedly, heedlessly, helter-skelter, holus-bolus, hotfoot, hotheadedly, hotly, hurriedly, hurry-scurry, immediately, in anger, in hot blood, in pas