General synonyms:
* Intense: This emphasizes the strength and power of the fierce thing.
* Vigorous: This highlights the energy and activity associated with being fierce.
* Strong: This is a simple but effective synonym.
* Powerful: Similar to "strong," but emphasizing the ability to exert influence.
* Aggressive: This emphasizes the forceful and assertive nature of being fierce.
* Ruthless: This conveys a lack of mercy or compassion, which can be a characteristic of fierceness.
More specific synonyms:
* Savage: This emphasizes the wild and untamed nature of being fierce.
* Ferocious: This is a stronger synonym than "fierce" and implies a more dangerous or threatening quality.
* Vicious: This implies a cruel and harmful nature, often associated with aggression.
* Brutal: This emphasizes the harshness and force of being fierce.
* Formidable: This conveys a sense of awe and respect, often associated with great power or strength.
Other options:
* Unrelenting: This emphasizes the determination and persistence of being fierce.
* Relentless: Similar to "unrelenting," emphasizing the lack of giving up.
* Tenacious: This emphasizes the strong grip and holding on to something, often associated with fierceness.
* Uncompromising: This conveys a refusal to yield or back down, which can be a characteristic of being fierce.
Ultimately, the best synonym for "fierce" will depend on the specific context and the meaning you want to convey.