Assumed identity can be described with various synonyms like false identity, fake persona, forged alias, assumed name, or identity theft. These terms refer to the act of taking on a different persona than one's true identity to deceive others. False identity suggests that the identity is not genuine, and fake persona refers to a fake personality created by the person. The forged alias implies that the name used is not their real name. Assumed name is a legal term used to refer to a name used by a person other than their legal name. Identity theft is a criminal activity that involves using someone else's personal information for financial gain or other illegal purposes.