Detenu is a word commonly used in law and referred to a person who is being detained or held captive. There are a few other synonyms for this word that can be used interchangeably, depending on the context. Some of these synonyms include prisoner, detainee, captive, inmate, and arrestee. All of these words express a similar meaning concerning a person's detention or imprisonment. The use of synonyms for detenu is relevant when conveying a message, writing a legal document or even in ordinary conversations. Understanding and making use of these synonyms can help improve communication and understanding between different legal and institutional systems.