/ Thesaurus / R Synonyms of ruthlessly Find synonyms for: Adverb1. ruthlesslyusage: in a ruthless manner; "the government has been urged to take immediate action to deal ruthlessly with the strikers"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language