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Synonyms and antonyms of. fierce. in English. fierce. Thesaurus > felt or experienced with a lot of force > fierce. These are words and phrases related to fierce. Click on any word or phrase to go to its thesaurus page. Or, go to the definition of fierce.
violent or angry: a fierce dog. a fierce attack. very strong or powerful: fierce wind. showing strong feeling or energetic activity: There is fierce competition among computer companies. (Definition of fierce from the Cambridge Essential Dictionary © Cambridge University Press)
Definition of fierce. English dictionary and integrated thesaurus for learners, writers, teachers, and students with advanced, intermediate, and beginner levels.