IPA: /ˈstʌdˌbʊk/
KK: /ˈstʌdˌbʊk/
A book that keeps official records of the ancestry and lineage of purebred animals, particularly horses and dogs.
The studbook is essential for tracking the breeding history of racehorses.
Studbook → The word is formed from 'stud' (from Old English *studu*, meaning a group of horses) and 'book' (from Old English *bōc*, meaning a written work or record). A studbook is a record book that lists the pedigree of horses, particularly for breeding purposes.
Think of a 'group of horses' ('stud') being recorded in a 'written work' ('book') — that's what a studbook is, a record of horse lineages.
No commonly confused words.