pure vs pureness

pure is not a noun while pureness is a noun.

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

pure (noun)	pureness (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

pure (adjective)	pureness (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