The term "Ursus Horribilis" refers to the grizzly bear, a large and intimidating carnivore found in North America. While commonly known by this Latin name, there are several synonyms that can be used to refer to this species. One example is the North American brown bear, which is a common alternative name. Another is the silvertip bear, which refers specifically to grizzly bears with white-tipped fur. The Kodiak bear is also sometimes considered a synonym, as it is a sub-species of the grizzly bear found in Alaska. Overall, while "Ursus Horribilis" is the scientific name, there are plenty of other terms that can be used to describe this majestic creature.