/ Thesaurus / M Synonyms of marginal utility Find synonyms for: Noun1. marginal utility, utilityusage: (economics) the amount that utility increases with an increase of one unit of an economic good or serviceWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: candid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language