/ Thesaurus / F Synonyms of fiercely Find synonyms for: Adverb1. ferociously, fiercelyusage: in a physically fierce manner; "silence broken by dogs barking ferociously"; "they fought fiercely"2. fiercelyusage: in an emotionally fierce manner; "she was fiercely proud of her children"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language