lavishness vs prodigality

lavishness and prodigality both are nouns.

Word	Noun	Adjective	Verb	Adverb
lavishness	Yes	No	No	No
prodigality	Yes	No	No	No

As nouns, lavishness and prodigality are synonyms defined as:

Other synonyms of lavishness include extravagance, high life, highlife.

lavishness (noun)	prodigality (noun)
the activity of excessive spending	the activity of excessive spending
the quality possessed by something that is excessively expensive	the trait of spending extravagantly