/ Thesaurus / U Synonyms of unregistered Find synonyms for: Adjective1. unregistered (vs. registered)usage: (of animals) not recorded with or certified by an official breed association; "unregistered dairy cattle"2. unregistered (vs. registered), unlistedusage: not registered; "an unregistered citizen"3. unregistered, undocumented (vs. documented)usage: (a boat or vessel) not furnished with official documentsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: gullible Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language