stupidity vs betise

stupidity and betise both are nouns.

Word	Noun	Adjective	Verb	Adverb
stupidity	Yes	No	No	No
betise	Yes	No	No	No

As nouns, stupidity and betise are synonyms defined as:

Other synonyms of stupidity include folly, foolishness, imbecility.

stupidity (noun)	betise (noun)
a stupid mistake	a stupid mistake
a poor ability to understand or to profit from experience