| Guarantor 1. (n.) One who makes or gives a guaranty; a warrantor; a surety. 2. (n.) One who engages to secure another in any right or possession. Thesaurus Entries angel, approver, backer, bailsman, bondsman, certifier, confirmer, cosignatory, cosigner, endorser, godfather, godparent, guarantee, guaranty, insurer, mainpernor, mortgagor, notary, notary public, party, patron, ratifier, signatory, sponsor, subscriber, surety, underwriter, upholder, warrantor |