Synonyms of on (an) impulse in English:

on (an) impulse


See definition of on impulse (or on an impulse)

phrase

1‘Valerie and I married on impulse’

SYNONYMS
impulsively, spontaneously, on the spur of the moment, without forethought, without planning, without thinking twice, without premeditation, unpremeditatedly
ANTONYMS

with forethought