/ Thesaurus / A Synonyms of ad val Find synonyms for: Adverb1. ad val, ad valoremusage: in proportion to the estimated value of the goods taxed; "the goods were taxed ad valorem"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: coincidence Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language