/ Thesaurus / J Synonyms of joshua tree Find synonyms for: Noun1. Joshua tree, Yucca brevifolia, yuccausage: a large branched arborescent yucca of southwestern United States having short leaves and clustered greenish white flowersWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language