The phrase "given as surety" implies an act of pledging something valuable as a guarantee of an obligation or a debt. Synonyms for this phrase include "put up as collateral," "used as security," "committed as a pledge," "offered in guarantee," "handed over as an assurance," and "entrusted as a bond." These synonyms express the same commitment or assurance of responsibility as "given as surety," but add an emphasis on the act of putting something up as collateral or using it as security. Choosing the appropriate synonym for the context can help to clarify the intended meaning and add variety to writing or speech.