luxury vs wealthiness

luxury and wealthiness both are nouns.

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

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

luxury: 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 luxury include wealth.

luxury (noun)	wealthiness (noun)
something that is an indulgence rather than a necessity	the state of being rich and affluent; having a plentiful supply of material goods and money
the quality possessed by something that is excessively expensive
wealth as evidenced by sumptuous living