ROGET THESAURUS
april fool
Laughingstock
N
laughingstock, jestingstock, gazingstock, butt, game, fair game, April fool, original, oddity, queer fish, odd fish, quiz, square toes, old monkey, old fogey, fogey monkey, fogy monkey, buffoon, pantomimist, schlemiel, jest, dum vitant stulti vitia in contraria currunt.
Dupe
N
dupe, gull, gudgeon, gobemouche, cull, cully, victim, pigeon, April fool, jay, sucker, laughingstock, Cyclops, simple Simon, flat, greenhorn, fool, puppet, cat's paw, credulous, mistaken.