The term "scary hairy" refers to something that is both frightening and covered in hair. However, there are many other synonyms that can be used to convey a similar idea. For example, the phrase "hairy monster" is a common alternative. Additionally, phrases like "horrifyingly hairy" or "hair-raisingly scary" can capture the same sense of fear and unease. Other options might include "terrifyingly shaggy" or "spooky and hairy." No matter the specific choice of words, the goal is to convey a sense of danger or menace that is closely tied to the presence of excessive hair.