Breadcrumb Home > Thesaurus > W Synonyms of warrantor Find synonyms for: Noun1. guarantor, surety, warrantor, warranter, patron, sponsor, supporterusage: one who provides a warrant or guarantee to anotherWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of warrantor (Dictionary) ✖ Related Content Daily Word Quiz: deracinate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language