luxuriousness vs wealthiness

luxuriousness and wealthiness both are nouns.

Word	Noun	Adjective	Verb	Adverb
luxuriousness	Yes	No	No	No
wealthiness	Yes	No	No	No

As nouns, wealthiness is a hypernym of luxuriousness; that is, wealthiness is a word with a broader meaning than luxuriousness:

luxuriousness: wealth as evidenced by sumptuous living
wealthiness: the state of being rich and affluent; having a plentiful supply of material goods and money

Other hypernyms of luxuriousness include wealth.

luxuriousness (noun)	wealthiness (noun)
wealth as evidenced by sumptuous living	the state of being rich and affluent; having a plentiful supply of material goods and money