purity vs pure

purity is a noun but pure is not a noun.

Word	Noun	Adjective	Verb	Adverb
purity	Yes	No	No	No
pure	No	Yes	No	No

purity (noun)	pure (noun)
a woman's virtue or chastity
being undiluted or unmixed with extraneous material
the state of being unsullied by sin or moral wrong; lacking a knowledge of evil

purity (adjective)	pure (adjective)
	(used of persons or behaviors) having no faults; sinless
	free of extraneous elements of any kind
	(of color) being chromatically pure; not diluted with white or grey or black
	in a state of sexual virginity
	free from discordant qualities
	concerned with theory and data rather than practice; opposed to applied
	without qualification; used informally as (often pejorative) intensifiers