Horrid is an adjective that describes something that is extremely unpleasant or offensive. There are several synonyms for this word that can be used interchangeably depending on the context. One such synonym is "awful," which describes something that is extremely unpleasant, distressing or terrible. Another synonym for horrid is "dreadful," which refers to something that is extremely bad or shocking. Additionally, the word "shocking" can also be used as a synonym for horrid, indicating something that is very surprising, alarming, or disturbing. Other synonyms for horrid might include abominable, hideous, loathsome, or revolting, all of which describe something that is extremely unpleasant or offensive.