The term 'put on an act' can be defined as pretending to be someone or something one is not. This can be done in various ways, such as by faking (4 letters), simulating (8 letters), pretending (7 letters), legislating (9 letters), feigning (5 letters), FAKED (5 letters), emoting (5 letters), EMOTED (6 letters), fakeit (6 letters), and actapart (8 letters). This phrase is often used to describe someone who is trying to deceive others by pretending to be something they are not.