detersive vs detergent

detersive is not a noun while detergent is a noun.

Word	Noun	Adjective	Verb	Adverb
detersive	No	Yes	No	No
detergent	Yes	Yes	No	No

As adjectives, detersive and detergent are synonyms defined as:

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

detersive (adjective)	detergent (adjective)
having cleansing power	having cleansing power