mishegaas vs foolery

mishegaas and foolery both are nouns.

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

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

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

mishegaas (noun)	foolery (noun)
(Yiddish) craziness; senseless behavior or activity	foolish or senseless behavior