betterment vs amelioration

betterment and amelioration both are nouns.

Word	Noun	Adjective	Verb	Adverb
betterment	Yes	No	No	No
amelioration	Yes	No	No	No

As nouns, betterment and amelioration are synonyms defined as:

betterment and amelioration: the act of relieving ills and changing for the better

Other synonyms of betterment include melioration.

betterment (noun)	amelioration (noun)
the act of relieving ills and changing for the better	the act of relieving ills and changing for the better
a change for the better; progress in development
an improvement that adds to the value of a property or facility