driving force Synonyms

drive thrust reason motive power kinetic energy powerhouse live wire push motivation leader spearhead prime mover electromotive force forefront chief reason chief motive impelling cause leading force moving power means of propulsion propulsive force hidden motive motive force hidden agenda propulsion power mover head force dynamo driver agenda doer core commander animator heart impetus impulse motivity motive momentum mainspring locomotion lead instigator initiator incentive agent