The term "terrorising" describes the act of causing fear or terror in someone. It is a strong word that can be replaced by a number of synonyms, depending on the context. Some examples of synonyms for "terrorising" include intimidating, frightening, threatening, scaring, frightening, daunt, frightening, alarming, and petrifying. These words convey the same sense of menace and apprehension as "terrorising," but they may be used in different situations. For instance, "intimidating" may be used to describe someone who is trying to dominate or bully another person, whereas "scaring" may be used to describe a horror movie or a haunted house. Ultimately, the choice of synonym will depend on the specific meaning and tone of the sentence or passage in which it is used.