/ Thesaurus / C Synonyms of convertible security Find synonyms for: Noun1. convertible, convertible security, security, certificateusage: a corporate security (usually bonds or preferred stock) that can be exchanged for another form of security (usually common stock)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: devout Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language