/ Thesaurus / U Synonyms of unforgivable Find synonyms for: Adjective1. inexcusable, unforgivable, unpardonable (vs. pardonable)usage: not excusableWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: inane Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language