sumptuousness vs sumptuosity

sumptuousness and sumptuosity both are nouns.

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

As nouns, sumptuousness and sumptuosity are synonyms defined as:

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

Other synonyms of sumptuousness include lavishness, luxury.

sumptuousness (noun)	sumptuosity (noun)
the quality possessed by something that is excessively expensive	the quality possessed by something that is excessively expensive
wealth as evidenced by sumptuous living