Breadcrumb Home > Thesaurus > O Synonyms of opportunity cost Find synonyms for: Noun1. opportunity cost, costusage: cost in terms of foregoing alternativesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. ✖ Related Content Daily Word Quiz: deracinate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language