The word "horridnesses" is a plural noun and refers to the quality or state of being horrid. Some synonyms for horridnesses include repulsiveness, ghastliness, frightfulness, monstrousness, vileness, and abhorrence. Other related words that may be used interchangeably include terribleness, atrocity, depravity, and wickedness, depending on the specific context. When describing something as horrid, it is often associated with negative attributes such as disgusting, offensive, appalling, or revolting. Whether used to describe a situation, person, or object, using synonyms can help to add depth and precision to your writing, allowing you to convey your message more effectively.