Prison, a place where people are incarcerated as punishment for committing crimes, has numerous synonyms that can be used to describe it. One of the most common is jail, which refers to a type of prison where people are detained while awaiting trial or serving short sentences. Penitentiary is another common synonym and is often used to describe a high-security prison designed to hold dangerous criminals. Other synonyms for prison include correctional facility, detention center, lockup, and reformatory. Each of these words has its own unique connotations and implications, but all refer to institutions designed to keep individuals convicted of crimes away from society.