/ Thesaurus / H Synonyms of hellishly Find synonyms for: Adverb1. infernally, hellishlyusage: extremely; "infernally clever"; "hellishly dangerous"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: ontiguous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language