/ Thesaurus / S Synonyms of storage tank Find synonyms for: Noun1. tank, storage tank, vesselusage: a large (usually metallic) vessel for holding gases or liquidsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: denizen Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language