Studbook is a term that refers to a list or registry of purebred horses, which are used specifically for breeding purposes. However, there are several other synonyms for the word studbook that are also used in the equine industry. These include breed registry, pedigree book, breeding book, genealogical record, and animal husbandry register. Breed registry and pedigree book both refer to a record of ancestry and breeding history, while breeding book and animal husbandry register are more general terms for any records related to animal breeding. Genealogical record is a broader term and can refer to records of any species, but is often used in the context of purebred animals such as horses, dogs, and cats.