Synonyms and related words :
abettor, actuator, agent, animator, author, begetter, beginner, cajoler, catalyst, causer, coax, coaxer, creator, effector, encourager, energizer, engenderer, father, firer, gadfly, galvanizer, generator, impeller, inducer, instigator, maker, mother, mover, moving spirit, originator, parent, persuader, pleader, prime mover, primum mobile, producer, prompter, sire, spark, spark plug, sparker, stimulator, tempter, wheedler