mitigative vs lenitive

mitigative is not a noun while lenitive is a noun.

Word	Noun	Adjective	Verb	Adverb
mitigative	No	Yes	No	No
lenitive	Yes	Yes	No	No

As adjectives, mitigative and lenitive are synonyms defined as:

mitigative and lenitive: moderating pain or sorrow by making it easier to bear

Other synonyms of mitigative include alleviative, alleviatory, mitigatory, palliative.

mitigative (noun)	lenitive (noun)
	remedy that eases pain and discomfort

mitigative (adjective)	lenitive (adjective)
moderating pain or sorrow by making it easier to bear	moderating pain or sorrow by making it easier to bear