Breadcrumb Home > Thesaurus > O Synonyms of overtax Find synonyms for: Verb1. overtax, taxusage: tax excessively; "Don't overtax my constituents!"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of overtax (Dictionary) ✖ Related Content Daily Word Quiz: prandial Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language