chlorination vs disinfection

chlorination and disinfection both are nouns.

Word	Noun	Adjective	Verb	Adverb
chlorination	Yes	No	No	No
disinfection	Yes	No	No	No

As nouns, disinfection is a hypernym of chlorination; that is, disinfection is a word with a broader meaning than chlorination:

chlorination: disinfection of water by the addition of small amounts of chlorine or a chlorine compound
disinfection: treatment to destroy harmful microorganisms

chlorination (noun)	disinfection (noun)
disinfection of water by the addition of small amounts of chlorine or a chlorine compound	treatment to destroy harmful microorganisms
the addition or substitution of chlorine in organic compounds