/ Thesaurus / Y Synonyms of yellow water flag Find synonyms for: Noun1. yellow iris, yellow flag, yellow water flag, Iris pseudacorus, iris, flag, fleur-de-lis, sword lilyusage: common yellow-flowered iris of Europe and North Africa, naturalized in United States and often cultivatedWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language