renovation vs melioration

renovation and melioration both are nouns.

Word	Noun	Adjective	Verb	Adverb
renovation	Yes	No	No	No
melioration	Yes	No	No	No

As nouns, melioration is a hypernym of renovation; that is, melioration is a word with a broader meaning than renovation:

Other hypernyms of renovation include improvement.

renovation (noun)	melioration (noun)
the act of improving by renewing and restoring	the act of relieving ills and changing for the better
the state of being restored to its former good condition	the linguistic process in which over a period of time a word grows more positive in connotation or more elevated in meaning
	a condition superior to an earlier condition