profligacy vs extravagance

profligacy and extravagance both are nouns.

Word	Noun	Adjective	Verb	Adverb
profligacy	Yes	No	No	No
extravagance	Yes	No	No	No

As nouns, profligacy and extravagance are synonyms defined as:

Other synonyms of profligacy include prodigality.

profligacy (noun)	extravagance (noun)
dissolute indulgence in sensual pleasure	the activity of excessive spending
the trait of spending extravagantly	the trait of spending extravagantly
	the quality of exceeding the appropriate limits of decorum or probability or truth