alterative vs healing

alterative is not a noun while healing is a noun.

Word	Noun	Adjective	Verb	Adverb
alterative	No	Yes	No	No
healing	Yes	Yes	No	No

As adjectives, alterative and healing are synonyms defined as:

Other synonyms of alterative include curative, remedial, sanative, therapeutic.

alterative (noun)	healing (noun)
	the natural process by which the body repairs itself

alterative (adjective)	healing (adjective)
tending to cure or restore to health	tending to cure or restore to health