revival vs betterment

revival and betterment both are nouns.

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

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

Other hypernyms of revival include advance, improvement.

revival (noun)	betterment (noun)
bringing again into activity and prominence	the act of relieving ills and changing for the better
an evangelistic meeting intended to reawaken interest in religion	a change for the better; progress in development
	an improvement that adds to the value of a property or facility