/ Thesaurus / R Synonyms of registered security Find synonyms for: Noun1. registered security, security, certificateusage: a security whose owner's name is recorded on the books of the issuer (or issuer's agent)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language