luxury vs sumptuosity

luxury and sumptuosity both are nouns.

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

As nouns, luxury and sumptuosity are synonyms defined as:

luxury and sumptuosity: the quality possessed by something that is excessively expensive

Other synonyms of luxury include lavishness, sumptuousness.

luxury (noun)	sumptuosity (noun)
something that is an indulgence rather than a necessity	the quality possessed by something that is excessively expensive
the quality possessed by something that is excessively expensive
wealth as evidenced by sumptuous living