/ Thesaurus / B Synonyms of black walnut Find synonyms for: Noun1. black walnut, black walnut tree, black hickory, Juglans nigra, walnut, walnut treeusage: North American walnut tree with hard dark wood and edible nut2. black walnut, walnutusage: American walnut having a very hard and thick woody shellWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: devout Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language