There are many synonyms for the phrase "atrocious characteristics". Some of these include: appalling qualities, dreadful traits, repugnant features, abominable attributes, and abhorrent properties. Other options might include deplorable traits, odious aspects, detestable characteristics, execrable qualities, or unspeakable features. When describing someone or something with these kinds of negative qualities, it's important to choose the right words that convey just how terrible or offensive they truly are. Whether you're writing a formal report, a personal essay, or just trying to describe a difficult situation, having a rich selection of synonyms at your disposal can help ensure that your language is both clear and impactful.