contamination vs decontamination

contamination and decontamination both are nouns.

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

contamination (noun)	decontamination (noun)
the act of contaminating or polluting; including (either intentionally or accidentally) unwanted substances or factors	the removal of contaminants
the state of being contaminated
a substance that contaminates