/ Thesaurus / L Synonyms of louis ix Find synonyms for: Noun1. Louis IX, Saint Louis, St. Louisusage: king of France and son of Louis VIII; he led two unsuccessful Crusades; considered an ideal medieval king (1214-1270)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: magnanimous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language