I.
a.
1.
Rash, inconsiderate, hasty, heady, reckless, thoughtless, impulsive, perilous, dangerous, ruinous, precipitate.
2.
Rushing precipitately, wildly tumbling.
3.
Steep, precipitous, sheer.
II.
ad.
1.
Rashly, hastily, precipitately, head-foremost, thoughtlessly, without deliberation.
2.
Hastily, hurriedly, without pause, without respite.
3.
At a rush, hurriedly, full tilt, helter-skelter, pell-mell, hurry-skurry.
4.
Prone, head-foremost, heels over head, on one's head, sheer downward.