pureblood vs pureblooded

pureblood is a noun but pureblooded is not a noun.

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

As adjectives, pureblood and pureblooded are synonyms defined as:

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

Other synonyms of pureblood include pedigree, pedigreed, thoroughbred.

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

pureblood (adjective)	pureblooded (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