detergent vs cleansing agent

detergent and cleansing agent both are nouns.

Word	Noun	Adjective	Verb	Adverb
detergent	Yes	Yes	No	No
cleansing agent	Yes	No	No	No

As nouns, cleansing agent is a hypernym of detergent; that is, cleansing agent is a word with a broader meaning than detergent:

detergent: a cleansing agent that differs from soap but can also emulsify oils and hold dirt in suspension
cleansing agent: a preparation used in cleaning something

Other hypernyms of detergent include cleaner, cleanser.

detergent (noun)	cleansing agent (noun)
a cleansing agent that differs from soap but can also emulsify oils and hold dirt in suspension	a preparation used in cleaning something
a surface-active chemical widely used in industry and laundering

detergent (adjective)	cleansing agent (adjective)
having cleansing power