alleviative vs palliative

alleviative is not a noun while palliative is a noun.

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

As adjectives, alleviative and palliative are synonyms defined as:

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

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

alleviative (noun)	palliative (noun)
	remedy that alleviates pain without curing

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