/ Thesaurus / U Synonyms of undergrow Find synonyms for: Verb1. undergrow, growusage: grow below something; "The moss undergrew the stone patio"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language