/ Thesaurus / D Synonyms of diabolically Find synonyms for: Adverb1. diabolically, devilishly, fiendishlyusage: as a devil; in an evil manner; "his writing could be diabolically satiric"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language