motive, payer, impulse, urge, impetus, propeller

stimulus, motivation, motive, impulse, motif, push

reason, cause, why, ground, purpose, motive

motive, inducement, impulse, reason, stimulus

engine, motor, motive, incentive

intent, purpose, intention, aim, design, motive

strengthening, reinforcement, consolidation, enforcement, intensification, motive

encourage, induce, prompt, stimulate, motivate, motive

rouse, incite, set, instigate, flesh, motive