/ Thesaurus / W Synonyms of willow herb Find synonyms for: Noun1. willowherb, herb, herbaceous plantusage: a plant of the genus Epilobium having pink or yellow flowers and seeds with silky hairsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language