/ Thesaurus / D Synonyms of darius iii Find synonyms for: Noun1. Darius IIIusage: king of Persia who was defeated by Alexander the Great; his murder effectively ended the Persian Empire (died in 330 BC)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language