chlorinated lime vs whitener

chlorinated lime and whitener both are nouns.

Word	Noun	Adjective	Verb	Adverb
chlorinated lime	Yes	No	No	No
whitener	Yes	No	No	No

As nouns, whitener is a hypernym of chlorinated lime; that is, whitener is a word with a broader meaning than chlorinated lime:

chlorinated lime: a white powder comprised of calcium hydroxide and chloride and hypochlorite and used to bleach and/or disinfect
whitener: an agent that makes things white or colorless

Other hypernyms of chlorinated lime include blanching agent, bleach, bleaching agent.

chlorinated lime (noun)	whitener (noun)
a white powder comprised of calcium hydroxide and chloride and hypochlorite and used to bleach and/or disinfect	an agent that makes things white or colorless