indiscretion vs foolishness

indiscretion and foolishness both are nouns.

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

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

Other hypernyms of indiscretion include folly, unwiseness.

indiscretion (noun)	foolishness (noun)
a petty misdeed	a stupid mistake
the trait of being injudicious	the trait of acting stupidly or rashly
	the quality of being rash and foolish