FRAUDULENT

n. 1 fake, counterfeit, forged, false, falsified, spurious, imitation, sham, pinchbeck, Colloq phoney or US also phony These banknotes are fraudulent 2 deceitful, dishonest, criminal, deceptive, tricky, artful, crafty, double-dealing, duplicitous, shifty, guileful, sharp, Colloq shady, crooked, bent Substituting paste for diamonds is a fraudulent act