Jailbirds is a term used to describe people who have been incarcerated in a prison or jail. Inmates, which is seven letters, is another word for prisoners. Termers, also seven letters, is a slang term for inmates who are serving long-term sentences. CONS, four letters, is a slang term for convicts. All three terms refer to people who have been convicted of a crime and are serving time in a correctional facility.