contamination vs impurity

contamination and impurity both are nouns.

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

As nouns, impurity is a hypernym of contamination; that is, impurity is a word with a broader meaning than contamination:

Other hypernyms of contamination include impureness.

contamination (noun)	impurity (noun)
the act of contaminating or polluting; including (either intentionally or accidentally) unwanted substances or factors	the condition of being impure
the state of being contaminated	worthless or dangerous material that should be removed
a substance that contaminates