The word "falser" generally refers to something that is untrue, deceptive or untrue. Some synonyms for the word "falser" include deceitful, fraudulent, insincere, counterfeit and misleading. Additional synonyms include duplicitous, fictitious, specious and treacherous. These synonyms can be used interchangeably with the word "falser" depending on the context in which it is being used. For example, a person who is described as deceiving someone could also be referred to as being false. Though the meanings may vary slightly, all of these synonyms express the same general idea of dishonesty or untrustworthiness.