A fierce fighter is someone who is willing to fight with great intensity and strength. The term can be used to describe a person or an animal. Two examples of fierce fighters are the TIGER and the BEARCAT. The TIGER is a large, powerful cat that is known for its ferocity and strength. The BEARCAT is a small mammal native to Southeast Asia that is known for its aggressive behavior and sharp claws. Both animals are fierce fighters and have been known to defend themselves and their territory with great vigor.