impulse Synonyms

incentive urge pulse inclination incitement need impulsion motivation hankering instigation instinct itch longing momentum motive stimulus spur pulsation whim caprice pulsing compulsion craving desire impetus drive signal shockwave thrust reactant transient rush reflex trend push spark plug thirstiness tendency spontaneity stimulant stimulation shock stimulator pulses seed temptation synergist vagary velleity kick in the butt