betise vs foolishness

betise and foolishness both are nouns.

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

As nouns, betise and foolishness are synonyms defined as:

Other synonyms of betise include folly, imbecility, stupidity.

betise (noun)	foolishness (noun)
a stupid mistake	a stupid mistake
	the trait of acting stupidly or rashly
	the quality of being rash and foolish