/ Thesaurus / U Synonyms of undeclared Find synonyms for: Adjective1. undeclared (vs. declared), unacknowledged, unavowedusage: not announced or openly acknowledged; "fighting an undeclared war"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language