Synonyms for Dissembling (same or very similar meaning)
WordNet sense 1 (pretending with intention to deceive):
feigning, pretense, pretenceWordNet sense 2 (concealing under a false appearance with the intent to deceive):
dissimulating, dissimulativeWordNet sense 3 (the act of deceiving):
deceit, deception, dissimulationFrom the ODE community, based on WordNetadd/edit