/ Thesaurus / F Synonyms of flagroot Find synonyms for: Noun1. sweet flag, calamus, sweet calamus, myrtle flag, flagroot, Acorus calamus, marsh plant, bog plant, swamp plantusage: perennial marsh plant having swordlike leaves and aromatic rootsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language