mishegaas vs craziness

mishegaas and craziness both are nouns.

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

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

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

mishegaas (noun)	craziness (noun)
(Yiddish) craziness; senseless behavior or activity	foolish or senseless behavior
	the quality of being rash and foolish
	informal terms for insanity