Fierce
Vicious
Synonyms: Ferocious, vicious, feral, undomesticated, bloodthirsty, cruel, murderous, threatening, grim, competitive, intense, relentless, savage, wild, untamed, aggressive, dangerous, brutal, menacing, terrible, cut-throat, keen, and strong.
Violent
Synonyms: Powerful, violent, bitter, blustery, boisterous, raging, turbulent, cyclonic, destructive, strong, forceful, stormy, gusty, tempestuous, furious, tumultuous, typhonic, and devastating.
Competitive
Synonyms: Aggressive, competitive, intense, relentless, vehement, impassioned, fervid, flaming, uncontrolled, intemperate, cut-throat, keen, strong, powerful, passionate, fervent, fiery, ardent, immoderate, and inordinate.
Example Sentences
The competition was fierce this year.
She had a fierce determination to succeed.
The storm brought fierce winds overnight.
He showed a fierce loyalty to friends.