A "sureties prisoner" refers to an individual who is held in custody until a surety (someone who takes responsibility for the person's actions) ensures their appearance in court. Synonyms for this term include "bail inmate," where bail is posted by a third party, ensuring the accused person's presence at trial. Another alternative is a "secured detainee," indicating that the person is being held until someone provides the required security or financial assurances. Additionally, the term "guaranteed defendant" can be used to describe someone who has been released on bail due to the guarantee given by another person or organization. These synonyms highlight the legal and financial aspects of the sureties prisoner's situation.