/ Thesaurus / C Synonyms of cul de sac Find synonyms for: Noun1. cul, cul de sac, dead end, passageusage: a passage with access only at one end2. blind alley, cul de sac, dead-end street, impasse, thoroughfareusage: a street with only one way in or outWordNet 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