Synonyms of unpremeditatedly

1 Syllable

fast

2 Syllables

promptly, flat-out, swiftly, rashly, quickly, nimbly

3 Syllables

double-quick, speedily, heedlessly, thoughtlessly, hurriedly, subito, rapidly, apace, recklessly, straightaway, suddenly, hastily, posthaste

4 Syllables

lickety-split, impetuously, agilely, carelessly

5 Syllables

prematurely, impulsively, expeditiously

6 Syllables

precipitately