impurity vs taint

impurity and taint both are nouns.

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

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

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

impurity (noun)	taint (noun)
the condition of being impure	the state of being contaminated
worthless or dangerous material that should be removed

impurity (verb)	taint (verb)
	contaminate with a disease or microorganism
	place under suspicion or cast doubt upon