The phrase "scary beaver" may not be the most common combination of words, but it can still provide inspiration for synonyms. For example, "frightening rodent" could be a less specific but more accurate alternative. "Terrifying buck-toothed creature" is another option that highlights the beaver's defining physical features. "Spooky dam-builder" adds an element of the supernatural to the mix, while "horrifying lumberjack's nightmare" potentially incorporates the implicit dangers of the forest. Ultimately, the phrase invites creative interpretations that can transform a seemingly mundane animal into something with a bit more edge.