Synonyms and related words :
babe, boob, breeze, butt, chump, cinch, credulous person, cull, dupe, easy mark, easy pickings, easy target, easy thing, fall guy, fish, fool, gobe-mouches, greener, greenhorn, greeny, gudgeon, gull, innocent, leadpipe cinch, mark, monkey, patsy, picnic, pie, piece of cake, pigeon, plaything, prize sap, pushover, sap, saphead, schlemiel, setup, sinecure, sitter, snap, stooge, sucker, toy, trusting soul, velvet, victim