impulse
impulse - noun
an instinctive motive
a sudden desire
the electrical discharge that travels along a nerve fiber
(electronics) a sharp transient wave in the normal electrical state (or a series of such transients)
the act of applying force suddenly
an impelling force or strength
impulse - thesaurus
caprice
impetus
impulsion
momentum
pulsation
pulse
pulsing
urge
whim