/ Thesaurus / Q Synonyms of quack grass Find synonyms for: Noun1. dog grass, couch grass, quackgrass, quack grass, quick grass, witch grass, witchgrass, Agropyron repens, wheatgrass, wheat-grassusage: European grass spreading rapidly by creeping rhizomes; naturalized in North America as a weedWordNet 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