mishegaas vs folly

mishegaas and folly both are nouns.

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

As nouns, folly is a hypernym of mishegaas; that is, folly is a word with a broader meaning than mishegaas:

Other hypernyms of mishegaas include craziness, foolery, indulgence, lunacy, tomfoolery.

mishegaas (noun)	folly (noun)
(Yiddish) craziness; senseless behavior or activity	foolish or senseless behavior
	a stupid mistake
	the trait of acting stupidly or rashly
	the quality of being rash and foolish