pureblood vs creature

pureblood and creature both are nouns.

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

As nouns, creature is a hypernym of pureblood; that is, creature is a word with a broader meaning than pureblood:

Other hypernyms of pureblood include animal, animate being, beast, brute, fauna.

pureblood (noun)	creature (noun)
a pedigreed animal of unmixed lineage; used especially of horses	a living organism characterized by voluntary movement
	a living being
	a person who is controlled by others and is used to perform unpleasant or dishonest tasks for someone else

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