revitalisation vs betterment

revitalisation and betterment both are nouns.

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

As nouns, betterment is a hypernym of revitalisation; that is, betterment is a word with a broader meaning than revitalisation:

Other hypernyms of revitalisation include advance, improvement.

revitalisation (noun)	betterment (noun)
bringing again into activity and prominence	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