/ Thesaurus / T Synonyms of tank car Find synonyms for: Noun1. tank car, tank, freight carusage: a freight car that transports liquids or gases in bulkWordNet 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