/ Thesaurus / Y Synonyms of ygdrasil Find synonyms for: Noun1. Yggdrasil, Ygdrasilusage: (Norse mythology) a huge ash tree whose roots and branches hold the earth and Heaven and Hell togetherWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language