impurity vs pollution

impurity and pollution both are nouns.

Word	Noun	Adjective	Verb	Adverb
impurity	Yes	No	No	No
pollution	Yes	No	No	No

As nouns, pollution is a hyponym of impurity; that is, pollution is a word with a more specific, narrower meaning than impurity:

impurity: the condition of being impure
pollution: undesirable state of the natural environment being contaminated with harmful substances as a consequence of human activities

Other hyponyms of impurity include adulteration, debasement, admixture, alloy, contamination, taint, dirtiness, putridity.

impurity (noun)	pollution (noun)
the condition of being impure	the act of contaminating or polluting; including (either intentionally or accidentally) unwanted substances or factors
worthless or dangerous material that should be removed	undesirable state of the natural environment being contaminated with harmful substances as a consequence of human activities
	the state of being polluted