/ Thesaurus / W Synonyms of william i Find synonyms for: Noun1. William I, William the Conquerorusage: duke of Normandy who led the Norman invasion of England and became the first Norman to be King of England; he defeated Harold II at the battle of Hastings in 1066 and introduced many Norman customs into England (1027-1087)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language