/ Thesaurus / A Synonyms of ad valorem tax Find synonyms for: Noun1. VAT, value-added tax, ad valorem tax, excise, excise taxusage: a tax levied on the difference between a commodity's price before taxes and its cost of productionWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language