Open English Wordnet
Nouns
(n)thoroughbreda racehorse belonging to a breed that originated from a cross between Arabian stallions and English mares
(n)thoroughbred, purebred, pureblooda pedigreed animal of unmixed lineage; used especially of horses
Adjectives
(s)pedigree, pedigreed, pureblood, pureblooded, thoroughbredhaving a list of ancestors as proof of being a purebred animal