1) Brightly 2) Brilliantly 3) Cruelly 4) Ferociously 5) Passionately 6) Tooth and nail 1) Brutally 2) Cruelly 3) Ferociously 4) In a physically fierce manner 5) In an ardent way 6) Viciously 7) Violently 8) Wildly 9) With angry intensity 
[adv] - in an emotionally fierce manner
fiercely 1. In an emotionally fierce manner: 'The mother was fiercely proud of her children.' 2. In a physically fierce manner. 3. Having a savage and violent nature; ferocious: 'The cat fiercely fought the dog which had attacked her.' 4. Extremely severe or violent; terrible. 5. Extremely intense or ardent: 'He was fiercely loyal to his family...