Sighthound & Pariah group is used by the United Kennel Club to classify a defined collection of dog breeds. Most other kennel clubs place a majority of hounds in their Hound groups, and the primitive types in other groups.
Sighthounds, also called gazehounds, are hounds that primarily hunt by sight and speed, instead of by scent and endurance as scent hounds do. Pariah dogs refers to a broad class of specific types of feral dogs. These two dog types have similar ancient lineage which is why United Kennel Club places them all in the same category.