lenitive vs alleviative

lenitive is a noun but alleviative is not a noun.

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

As adjectives, lenitive and alleviative are synonyms defined as:

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

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

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

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