pureblooded vs pureblood

pureblooded is not a noun while pureblood is a noun.

Word	Noun	Adjective	Verb	Adverb
pureblooded	No	Yes	No	No
pureblood	Yes	Yes	No	No

As adjectives, pureblooded and pureblood are synonyms defined as:

pureblooded and pureblood: having a list of ancestors as proof of being a purebred animal

Other synonyms of pureblooded include pedigree, pedigreed, thoroughbred.

pureblooded (noun)	pureblood (noun)
	a pedigreed animal of unmixed lineage; used especially of horses

pureblooded (adjective)	pureblood (adjective)
having a list of ancestors as proof of being a purebred animal	having a list of ancestors as proof of being a purebred animal