Predaciousness is defined as the trait of being predatory or preying on others. Some synonyms of predaciousness include aggressiveness, rapaciousness, voracity, predatory behavior, and predatory instincts. These synonyms have similar meanings and can be used interchangeably with predaciousness depending on the context. For example, a person who constantly takes advantage of others for their own gain can be described as having predatory instincts or exhibiting rapaciousness. Similarly, an animal that hunts and preys on other animals can be described as having predatory behavior or displaying aggressiveness, voracity or predaciousness. In summary, these synonyms help to convey the same meaning as predaciousness and can be used to add variety and depth to writing.