stupidity vs folly

stupidity and folly both are nouns.

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

As nouns, stupidity and folly are synonyms defined as:

Other synonyms of stupidity include betise, foolishness, imbecility.

As nouns, folly is a hyponym of stupidity; that is, folly is a word with a more specific, narrower meaning than stupidity:

stupidity (noun)	folly (noun)
a stupid mistake	foolish or senseless behavior
a poor ability to understand or to profit from experience	a stupid mistake
	the trait of acting stupidly or rashly
	the quality of being rash and foolish