Synonyms and related words :
artless, befoolable, born yesterday, credulous, cullible, deceivable, deludable, dupable, easy, exploitable, foolable, green, hoaxable, hoodwinkable, humbugable, immature, inexperienced, ingenuous, innocent, naive, persuadable, seduceable, simple, soft, susceptible, unsophisticated, unsuspecting, unsuspicious, unwary, victimizable, wide-eyed