/ Thesaurus / A Synonyms of avoirdupois unit Find synonyms for: Noun1. avoirdupois unit, mass unitusage: any of the units of the avoirdupois system of weightsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: kiln Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language