thoroughbred

nouns

a well-bred person
thoroughbred
is a type of (narrower)
a fully developed person from maturity onward
adult, grownup
a racehorse belonging to a breed that originated from a cross between Arabian stallions and English mares
thoroughbred
is a type of (narrower)
a horse bred for racing
bangtail, race horse, racehorse
a pedigreed animal of unmixed lineage; used especially of horses
pureblood, purebred, thoroughbred

adjectives

having a list of ancestors as proof of being a purebred animal
pedigree, pedigreed, pureblood, pureblooded, thoroughbred