cleanness vs purity

cleanness and purity both are nouns.

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

As nouns, purity is a hypernym of cleanness; that is, purity is a word with a broader meaning than cleanness:

cleanness: without moral defects
purity: the state of being unsullied by sin or moral wrong; lacking a knowledge of evil

Other hypernyms of cleanness include innocence, pureness, sinlessness, whiteness.

cleanness (noun)	purity (noun)
the state of being clean; without dirt or other impurities	a woman's virtue or chastity
without moral defects	being undiluted or unmixed with extraneous material
	the state of being unsullied by sin or moral wrong; lacking a knowledge of evil