folly vs indulgence

folly and indulgence both are nouns.

Word	Noun	Adjective	Verb	Adverb
folly	Yes	No	No	No
indulgence	Yes	No	No	No

As nouns, folly and indulgence are synonyms defined as:

Other synonyms of folly include craziness, foolery, lunacy, tomfoolery.

folly (noun)	indulgence (noun)
foolish or senseless behavior	the act of indulging or gratifying a desire
a stupid mistake	foolish or senseless behavior
the trait of acting stupidly or rashly	the remission by the pope of the temporal punishment in purgatory that is still due for sins even after absolution
the quality of being rash and foolish	an inability to resist the gratification of whims and desires
	a disposition to yield to the wishes of someone