The term "jail-bird" is a slang term used to describe a prisoner or someone who has spent a significant amount of time in jail. There are several synonyms for "jail-bird" including convict, inmate, prisoner, jailbird, felon, offender, wrongdoer, detainee, gaolbird, criminal, and detainee. Each of these synonyms describes someone who has been found guilty of a crime and punished with a jail sentence. These terms are often used interchangeably in the criminal justice system and in everyday conversation. Although these synonyms all describe someone who has been imprisoned, they do not necessarily convey the same connotation as "jail-bird," which can carry a negative or derogatory connotation.