Minacious is an adjective that means threatening or menacing. It's often used to describe something that's perceived as being dangerous or causing fear. However, if you're looking for alternatives, there are several synonyms that you can use to add variety to your writing. For example, you could use the words ominous, dire, or sinister, which all convey a sense of impending danger. Other options include menacing, forbidding, or intimidating, which all suggest that an individual or situation is causing fear or dread. Regardless of which synonym you choose to use, it's important to consider the context and tone of your writing to ensure that it's appropriate for the situation.