/ Thesaurus / E Synonyms of ex gratia Find synonyms for: Adjective1. ex gratia, optional (vs. obligatory)usage: as a favor; not compelled by legal right; "ex gratia payments made to nonstriking workers"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language