/ Thesaurus / D Synonyms of department of transportation Find synonyms for: Noun1. Department of Transportation, Transportation, DoT, executive departmentusage: the United States federal department that institutes and coordinates national transportation programs; created in 1966WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: heifer Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language