Synonyms and related words :
active, actuating, animating, causal, causative, compelling, compulsive, directive, driving, gripping, holding, impellent, impulsive, in motion, inducive, mobile, motile, motivating, motivational, motive, motor, moving, obsessing, obsessional, obsessive, possessing, preoccupying, pressing, propellant, propelling, pulsive, stirring, thrusting, transitional, traveling, urgent