foolishness vs mistake

foolishness and mistake both are nouns.

Word	Noun	Adjective	Verb	Adverb
foolishness	Yes	No	No	No
mistake	Yes	No	Yes	No

As nouns, mistake is a hypernym of foolishness; that is, mistake is a word with a broader meaning than foolishness:

foolishness: a stupid mistake
mistake: a wrong action attributable to bad judgment or ignorance or inattention

Other hypernyms of foolishness include error, fault.

foolishness (noun)	mistake (noun)
a stupid mistake	a wrong action attributable to bad judgment or ignorance or inattention
the trait of acting stupidly or rashly	an understanding of something that is not correct
the quality of being rash and foolish	part of a statement that is not correct

foolishness (verb)	mistake (verb)
	to make a mistake or be incorrect
	identify incorrectly