/ Thesaurus / H Synonyms of horse brier Find synonyms for: Noun1. bullbrier, greenbrier, catbrier, horse brier, horse-brier, brier, briar, Smilax rotundifolia, vineusage: a very prickly woody vine of the eastern United States growing in tangled masses having tough round stems with shiny leathery leaves and small greenish flowers followed by clusters of inedible shiny black berriesWordNet 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