There are several synonyms for the term "police lineup" which refers to a procedure where witnesses are asked to identify a suspect from a group of individuals. A common synonym is "suspect lineup" which is often used interchangeably with the term "police lineup". Other alternatives include "identity parade", "lineup identification", "perp walk" and "witness identification". The term "identity parade" is commonly used in the UK, while "perp walk" is a term popular in the United States. Regardless of the term used, police lineups are an important part of the legal system, helping to ensure that innocent individuals are not wrongly convicted.